Current MDX Release Fixlog
Note:
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XXXX.XX.XX (entries bounded by asterisks indicates changes that relate to changes in output)
***************************************************************************************
FIXLOG ENTRIES:
2026.10.20 Fixed several interface issues/crashes, including negative moment reinforcement,
intermediate transverse stiffener locations, hinge locations, and additional node
locations input forms. Also fixed a numerical formatting issue (issue was only
with the display in the input forms, not with the input and processing of output),
and fixed an issue which was sometimes not allowing direct editing to occur.
************************************************************************************************
2026.10.7 Fixed problem with ASD ratings at splice locations where it was not always
using the section properties for the correct side of the splice and/or including
lateral bending stress in the rating factor calculation at the splice locations.
************************************************************************************************
*********************************************************************************************
2026.9.30 Fixed some issues related to hybrid factor Rh, load shedding factor Rb, and other
allowables anomalies. Fixed issue with interpolating 20th pt and 100th pt shears
in the constructibility of web during pouring tables. Improved stiffener integrity
checking and associated warning messaging.
********************************************************************************************
2026.9.30 Server error on login has been resolved.
2026.9.16 Input files are now included in output tables reports.
2026.9.2 Fixed problem where line girder execution does not terminate.
2026.8.11 Fixed problem with wizard related to radio button groups.
2026.8.6 Fixed problem where directory for license file was not created
when it didn't already exist.
2026.8.5 Default path for new projects is now in appdata directory path.
Use Save As to copy project to another location after project is created.
2026.6.26 PDF Reports have been re-written, fixed a crash when creating a new project.
2026.6.16 Wizards have been re-written for stability. File Save As problem has been fixed.
**********************************************************************************************
2026.5.13 Fixed anomalies of some live load shears/concurrent moments in LFD gsa projects.
Recently reported Wizard crashes have now been Fixed.
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2026.4.29 Fixed a problem where LIMIT NEG MOM REGIONS TO ELASTIC STRENGTH was not working
when hinges are present near supports.
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2026.4.2 Fixed a problem that could sometimes occur in determining factored strength near
inflection points in LFD projects.
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2026.3.20 Fixed issue for LAN client license files.
Added printer dialog to report generator.
2026.3.17 Fixed some issues with the DETAILED CALCS command. Now when this command is
used, the details will show up in the list of tables of girder rating output
(while in the project directory it is generated as CALCSi.TXT for girder i.)
2026.3.11 Fixed an issue where line girder live load deflections were not accounting for
stiffness from rolled shape cover plates or box girder bottom flange stiffeners
(which was resulting in somewhat higher live load deflections), and were not
accounting for composite regions specified with COMSPC (which was resulting in
somewhat lower live load deflections.)
*************************************************************************************************
2026.3.5 CLASS I PROBLEM FIXED: UPDATE IS REQUIRED FOR LINE GIRDER PROJECTS
FIXED A PROBLEM THAT COULD OCCUR IN RECENT VERSIONS DURING LRFD LINE GIRDER RUNS:
WHEN ANY OF TFACT,TFACTT,TFACTF WERE USED TO MODIFY TRUCK LOADING, THE PROGRAM WAS
NOT APPLYING ANY TRUCK LOADING (I.E., WAS ONLY CONSIDERING LANE LOADING).
(THIS PROBLEM DID NOT OCCUR IN GIRDER SYSTEM PROJECTS.)
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**************************************************************************************************
2026.3.4 LRFD projects now use the lower of the transverse stiffener spacing of either side of
the transverse stiffener when determining shear strength at transverse stiffener locations,
in accordance with AASHTO guidance in the variables definitions section of Chapter 6 LRFD.
(Prior to this change, the program was using the higher of the two spacings.)
**************************************************************************************************
2026.2.23 Cloud license server now uses port 443 instead of 5053.
This update will automatically configure the license on your computer.
2026.2.17 Fixed a problem that could occur with generating framing plan layout.
Multithreading in MDX Client has been improved, threads are now used
only for ticking clock and license status checking.
2026.1.26 Fixed an issue where input editor crashed after exiting a wizard.
MDXClient now creates a log file that tracks the history of events that occur
during a session.
2026.1.6 MDXClient has been updated to native 64-bit to fix an incompatibility with a PDF library.
RLM has been updated to 64-bit and uses SSL port 443 to communicate with the license server.
Code signing certificate has been renewed.
**************************************************************************************************
2025.12.10 (1) Fixed an issue where the interface was rounding down the input command NMOD (when
given for specifying modular ratio) from one with decimals to just an integer, so that
it also works for NMOD values with decimals.
(2) Fixed issues that were occurring with the A6 moment capacity tension flange limit
for factored strengths so that it is based on Rpt*Myt (instead of simply the tension
flange yield.)
**************************************************************************************************
2025.12.4 Fixed an issue that was sometimes causing interface crashes.
2025.11.24 This update improves batch file load cases. The file LOADCASE.IN can now be
copied to the project directory and read from there, and batch file syntax
is simpler:
CD c:\program files (x86)
CD MDX 2025
CD MDX CLIENT
SET PROJECT="c:\mdx\project1\project1.mdx"
MDXCLIENT.EXE LOADCASE 1 %PROJECT%
MDXCLIENT.EXE LOADCASE 2 %PROJECT%
MDXCLIENT.EXE LOADCASE 3 %PROJECT%
2025.11.17 This update fixes a problem where line girder generation menus were inactive.
2025.11.10 This update fixes a problem with report generation.
***************************************************************************
2025.10.31 (1) Fixed allowable stress determination issue at splices on haunched webs
where web splices were offset from flange splices.
***************************************************************************
(2) Updated interface to work better during girder design generation projects,
and improved navigation among output tables when going from girder to girder.
Also fixed issue that could occur when .MDX files are renamed outside of the
program.
2025.10.22 This update fixes a problem with the input editor which overwrote other
girder input files with the last girder input that was edited.
2025.9.29 This update adds "Activate MDX" to the Start menu.
2025.9.23 This update checks for the license in the program directory first, then the
user directory. This affects silent scripted installations using MSIEXEC.
If installing the MSI by script, the license file should be copied into the
program directory by script as well.
2025.9.22 We have migrated to a new cloud-based license server, this update will require
an activation code. Please contact support@mdxsoftware.com to request your
activation code. The interface has been optimized to provide unobstructed
access to the menu and listbox items, resulting in a more streamlined user
experience. The installer has been improved to no longer require administrator
access, making it easier to install and update for the end user. This update
lays the groundwork for future improvements.
2025.9.4 Reactivated the condition command OVERRIDE GIRDER SPACING RESTRICTION which
allows girder system analyses runs with defined lanes when girder spacing
is below 4.5' (which is the official limitation of the program to
avoid anomalies that may occur in live loading.)
2025.9.2 A file permission issue in the installer has been corrected.
2025.8.29 MDXClient has been updated to access new cloud server.
2025.8.16 The installer has been split into two separate projects.
MDX2025.EXE does not require administrative login, while
MDX2025.MSI requires an administrative login for scripted
installs. Both of these will update previous versions
without uninstalling first.
2025.8.11 MDXClient now produces pdf files for Plots.
2025.7.31 MDXClient now works with both administrator and per-user installations.
2025.7.23 Fixed issue with error message showing "login failed".
*****************************************************************************************
2025.7.13 Fixed problem with interpolating steel only analysis moments to tenth points
when using INTERMEDIATE BRACING NOT BOLTED FOR STEEL ANALYSIS. Fixed problem
with LFD line girder deflections when using WHEELD.
*****************************************************************************************
2025.6.24 Added manifest and configuration file for MDXClient.
2025.4.4 MDXClient wizards now have faster loading wizard forms.
Fixed a problem running batch ratings.
******************************************************************************************
2025.3.24 Fixed a problem that could occur in girder system projects where girder 1 input
sometimes was overwriting other girder inputs. (You can see if this may have
occurred in your project(s) by checking that IGIRD i, where i is the girder
number, is correct for each girder input.)
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2025.3.14 Added missing icon to MDXClient installer.
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2025.3.11 Fixed a problem where lateral bending stresses were being amplified on the
last tenth point of girders in curved LRFD projects, which typically was only
an issue when integral abutments were involved. Also, improved the handling
of renamed projects to prevent crashes that could have occurred as a result of
renaming of projects without using "File:Save As".
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2025.3.5 Fixes applied to download page.
2025.2.28 A problem when running a project from MDX 2025 has been fixed.
2025.2.10 MDX 2025 is now available. Project paths were limited to 256 characters, now
can be up to 1000 characters. Graphics View has been restored. Licensing has
been updated to latest version. It is recommended to uninstall MDX 2024 to
avoid confusion with MDX 2025.
2024.12.31 Batch runs for load cases have been rewritten, and now works properly.
2024.12.23 Fixed an issue with batch file runs for multiple load cases.
************************************************************************
2024.12.23 An additional fix for the settlement issue (which 2024.7.24 originally
addressed, but another follow up fix was needed to fix issue where
brace is only on one side of a support.)
************************************************************************
2024.11.15 Resolved an issue where cloud licenses were falsely identified as line
girder license rather than girder system license.
2024.10.18 Resolved an issue that could occur in the ratings tables when both HL93 and
permit trucks are being run (where if the factored stresses exceeded yield
for a noncompact section for one of these then the ratings tables would
always show that it exceeded yield for both of these whether or not this was
the case). A footnote was added to the ratings tables telling the user to
refer to the flange factored bending stress tables to look for this
indication. Also, fixed an issue in the interface where it was not saving
the output files into the .MDX file.
************************************************************************************
2024.10.6 Fixes some issues that could occur for LRFD allowable stresses at splice
locations, 20th, 100th pts. Also, an additional fix for the settlement
issue (which 2024.7.24 originally addressed, but a followup was needed.)
************************************************************************************
2024.8.28 Cloud license behavior has been improved. Recommend updating
if cloud license has been inconsistent.
************************************************************************
2024.7.24 Fixed a problem with girder system analysis where settlement
effects in dead load analyses (with SE1-i and/or SE2-i) were
not functioning properly.
************************************************************************
2024.5.16 Fixed crash when switching girders when viewing output table.
2024.4.15 Batch runs for loadcases have been improved. After installing this update, the
batch file that runs loadcases will appears as follows. You will need to copy
LOADCASE.IN to "c:\users\xxx\APPDATA\Roaming\MDXSoftware\MDXClient" before running
the batch file.
- copy this to mdxrun.bat -
REM EDIT THE FOLLOWING TWO LINES
SET DIRECTORY=C:\ProjectDirectory
SET PROJECT="%DIRECTORY%\ProjectName.mdx"
@ECHO OFF
if not exist %DIRECTORY%\LOADCASE\ ( MD %DIRECTORY%\LOADCASE )
ECHO Running %PROJECT%
CALL :RUNLOADCASE 1
CALL :RUNLOADCASE 2
CALL :RUNLOADCASE 3
exit /b
:RUNLOADCASE
ECHO Running loadcase %~1
ECHO
C:
CD\
CD Program Files (x86)
CD MDX 2024
CD MDX Client
MDXCLIENT.EXE LOADCASE %~1 %PROJECT%
CD %DIRECTORY%
CD LOADCASE %~1
TYPE LOADCASE%~1.OUT
GOTO :EOF
- end copy -
2024.3.20 Output navigation has been rewritten to be faster.
2024.3.4 Fixed a crash when viewing Messages due to invalid file path.
2024.2.18 Fixed a problem with LRFD girder module where table generation was incomplete.
2024.2.14 Fixed an error message that said "cannot write input file".
2023.11.21 Fixed an issue that was preventing a 19 span line girder LRFD case from running.
2023.11.17 Fixed a termination where file attribute was reported as "NotContentIndexed".
2023.11.13 Fixed a termination that could incorrectly occur in LFD line girder
projects with hinges. Fixed a crash in the Define:Girder input wizard
that was occurring for more than 100 intermediate transverse stiffeners.
***************************************************************************
2023.11.8 Fixed an issue with the determination of section properties when
the BNCLIP command was used to step down the web depth at supports
in LFD projects. Fixed an issue with torque influence surfaces on
overhangs that could result in the amplification of live load torque
near the end of the girder in medium and high resolution girder
system models.
***************************************************************************
2023.10.27 Fixed a problem where girder outputs were not generating completely,
and some related crashes.
2023.9.29 Fixed an issue where girder output wasn't being generated.
Added a new LFD girder condition INCLUDE LATERAL BENDING STRESSES
FOR OVERLOAD to provide the option to add lateral bending stresses
(100%) to factored overload stresses. (Whether or not this condition
is used, the allowable stresses for overload checking still consider
lateral bending stresses from curvature.)
2023.9.18 Fixed some issues related to importing GCD-i, LCD-i that
were occcuring when creating new general geometry projects.
Fixed issue of missing file reported on generating
analysis.
2023.7.7 - Fixed issue with the installer that was not indluding some files, so the message
"Could not find system file" occured when running a project.
2023.6.30 - Fixed issue with running batch file load cases. Fixed a crash that could
occur when defining concrete properties in design projects.
2023.6.21 - MDXClient: fixed issue where projects might have a problem being saved.
2023.6.23 - MDXClient: fixed issue where slab pour sequence analysis button was not available
in Analysis Settings
2023.6.21 - MDXClient fixed issue where the condition IGNORE CURVED GIRDER HYBRID RESTRICTION
was being stripped out of girder input files, fixed issue where Form 3001 was crashing.
2023.6.8 - MDXClient fixed issue with a termination message being falsely triggered
that was preventing girder system layout runs from running.
2023.5.25 - MDXClient added diagnostics to detect file permission problems.
2023.5.10 - MDXClient fixed issue with menu not allowing the importing of girder (GCD-i)
and lane coordinates (LCD-i).
2023.5.3 - MDXClient fixed problem in girder system layout definition that
only was occuring for parallel/concentric layouts with girder spacing
varying between girders.
2023.4.28 - MDXClient fix for missing command TANDEMP, and several other fixes to avoid
crashes. Added messages to help guide user through the various input steps
of girder system projects. Fix for recent cloud license issue.
2023.4.25 - MDXClient fix for failing to create directory when creating new project
2023.4.21 - MDXClient fix for invalid license file path on startup
2023.4.18 - MDXClient fixed menu crashes mostly occuring in design generation projects.
[NOTE: A change has been made to the cloud license server which will
require updating your installation(s) to the latest version.]
2023.3.27 - MDXClient fix for licenses erroneously limited to line girder only
2023.3.8 - MDXClient fix for crash on Form 5122
2023.3.3 - MDXClient fix to correct program directory issue
***********************************************************************************
2023.2.21 - Fixed problem with concentrated composite dead loads (PLD2,PDL2SP) not
being included in composite deflections in LRFD line girder projects (problem only
occurred with composite deflections, not forces. Fixed issue with applying shear
correction factors determined by the program to lane fractions. Added DETAILED CALCS
report to the girder rating output menu listings. Also, added description labels to
the DETAILED CALCS FOR LANES FRACTIONS report to show when only one wheel fits in a
lever rule context (however, this didn't affect lanes fraction calculations as these
were being correctly determined, but this was not described clearly in the report.)
***********************************************************************************
2023.2.7 - Fixed problem where the interface was not allowing the LRFD line girder
lane fraction parameter DE to be varied by 10th pt.
2023.2.5 - MDXClient now allows .MDX files to be renamed, without affecting the
editing and execution of the project.
2023.2.1 - Fixed problem where the interface was not allowing the DETAILED CALCS
command to be added to girder input.
***************************************************************************
2023.1.17 - Fixed a problem with the listing of hinge locations and the
interpolated reactions at hinges in girder output.
***************************************************************************
*************************************************************************************
2023.1.12 - Fixed a problem with maximum bending performance ratios for permit trucks
that were being shown in the Max Performance Ratio summary where it was instead
showing those for design trucks if the ratio was greater than for permit trucks
in LRFD projects. (The tables where all the performance ratios are shown for the
various effects were unaffected.) Also, fixed an issue where upon reviewing the
layout of parallel/concentric projects in the menu, the staggered intermediate brace
spacings that had previously been defined might be removed, leaving only the
nonstaggered bracing input (BR-1).
*************************************************************************************
2022.12.15 - Fixed some behavior on Effective Slab Width by 10th pt and Tributary Slab
Width by 10th pt forms that may have led to crashes in the menu.
2022.12.13 - (1) MessageBox for license initialization error has been added to keep on
screen if error occurred, (2) project SaveAs file paths have been fixed
2022.12.5 - Fixed crash in menu for defining girder system layout bracing skew (BSK-i).
Also, fixed issue on girder system layout generation runs with popup window warnings
of design method not selected when it had been.
********************************************************************************
2022.11.17
CLASS I PROBLEM FIXED: UPDATE IS REQUIRED FOR PLATE AND ECCENTRIC BEAM MODEL RUNS
A potentially significant problem has just been fixed that had recently been
occurring with the generation of plate and eccentric beam (peb) models.
The symptoms could either be slight or obvious in the results. This problem
could have affected peb models run with build version numbers between 2022.9.1
to 2022.11.12. (This problem was accidentally introduced as a result of a recently
added command to the program, STRNODEX, and was sometimes interfering
with the generation of peb models that didn't even have stringers.)
[While the issue is not likely to have affected grid model runs, we nevertheless
highly recommend updating your installation to prevent encountering this problem
in case you were to switch from the grid model to the peb model while running any
version of the program between the build dates (9/1/22-11/12/22).]
********************************************************************************
2022.11.15 - Fixed problem where bracing warnings were presented as girder
warnings in PDF reports.
2022.11.12 - Fixed crash in system projects caused by problem with the temporary file
target directory.
*********************************************************************************
2022.11.11
(1) Improved the shear determination routines for girder system projects to avoid
anomolies that could sometimes occur when wheels are being located close to shear
influence surface discontinuities. (2) fixed an LFD allowable stress problem that
had recently been occurring in incremental factored bending stress output.
*********************************************************************************
2022.11.1 - fixed crash general geometry input coordinates in wizard
2022.10.25 - fixed crash when viewing an output page
2022.10.24 - fixed problem where group policy in user directory
prevented program from executing, fixed crash when _current.pdf
was in use from another process, reduced font size in pdf so
tables are not truncated on the right border
2022.10.20 - fixed problem with installer digital signature
2022.10.17 - MDXCLIENT: added support for PBETAOP for LRFD girders
2022.10.03 - MDXCLIENT: rebuild for cloud licensing changes
2022.09.29 - MDXCLIENT: fix for not releasing licenses upon exit
2022.09.28 - MDXClient2022.exe was not being updated on download page since 2022.09.23
2022.09.27 - MDXCLIENT: no product name or version specified error has been fixed
2022.09.23 - MDXBRACE: fixed formatting issue that was truncating value in table
2022.09.22 - MDXLRFD: fixed problem where tracing was left active which caused the
program to crash
2022.09.14 - fixed problem where cloud license was not being released when MDXClient exits
***************************************************************************************
2022.09.01 - NEW FEATURE: added STRNODEX command to allow more nodes to be added to stringer
(STRLIN) beams. MDXCLIENT: "all seats are busy" is now a modal dialog box.
***************************************************************************************
2022.08.12 - installer version changed to reflect date of posting
2022.08.08 - fixed crash for large LRFD project where LL distribution factors were used
************************************************************************************
2022.07.25 - Fixed lane generation issue for a highly skewed girder system project.
************************************************************************************
2022.07.05 - added shortcut to installer to update license file.
2022.06.29 - rlm1425.dll was not found, which prevented MDXClient from launching
2022.06.27 - "Save As" now creates new directory, renames file names to new name,
creates <newproject>.MDX in the new project directory, and opens new project in interface
2022.06.23 - installer path to program directory changed to prevent conflict with version 6.5
2022.06.12 - client license file can now be copied to installed program directory to enable deployment
of system image to multiple users on a network
2022.06.02 - fixed various crashes in opening and running projects.
2022.06.01 - fix for renamed .MDX files that do not agree with compressed filenames.
fixed problem where interface disappears when analysis runs.
2022.05.31 - BitDefender flagged a possible virus, appears to be a false positive.
2022.05.27 - crash in LFD girder program related to improper formatting on web splice
table has been fixed.
2022.05.26 - crash on Form 2 and Form 6 due to uninitialized data has been fixed.
2022.05.24 - installer not updating files has been fixed.
2022.05.23 - crash when creating new project has been fixed.