Possible "MultipleThread" issue with version 2026.03

[WILSON TRIGUEIRO DE SOUSA JÚNIOR]

Dear Harry,

Testing version 2026.03, I faced some error while trying to “MultipleRun” in more than 1 thread to run faster Multiple Replications (Simulation>>MultipleRuns>>NumberOfThreads).
The model and the error print are attached.
Please, could you help me with that error?

Log Viewer:

Operating System: Windows 11 (version: 10.0) (arch: amd64)
Java: Oracle Corporation (version: 25.0.3)
Software: JaamSim (version: 2026-03)

Loading Simulation Environment ...
Simulation Environment Loaded
Configuration File Loaded
View window requested: View1
Found OpenGL version: 4.6 (Compat profile, arb, compat[ES2, ES3, ES31, ES32], FBO, hardware) - 4.6.0 NVIDIA 595.79
Found GLSL: #version 460 compatibility

OpenGL Major: 4 Minor: 6 IsCore:false
Renderer initialized
Renderer loop started
View window created: View1
View window displayed: View1
RenderManager loop started
com.jaamsim.basicsim.ErrorException: Simulation keyword 'Name':
Input value is locked
at com.jaamsim.basicsim.Entity.copyInput(Entity.java:660)
at com.jaamsim.basicsim.JaamSimModel.<init>(JaamSimModel.java:216)
at com.jaamsim.basicsim.RunManager.start(RunManager.java:77)
at com.jaamsim.ui.GUIFrame$87.run(GUIFrame.java:3203)
at java.base/java.lang.Thread.run(Thread.java:1623)
Caused by: com.jaamsim.input.InputErrorException: Input value is locked
at com.jaamsim.input.InputAgent.apply(InputAgent.java:597)
at com.jaamsim.basicsim.Entity.copyInput(Entity.java:657)
... 4 more

[Harry King]

Hi Wilson,

Thank you for reporting this bug. It turns out that we had broken the multiple threads feature in release 2026-01 and had not realized it until now.

We will issue a new release that fixes the problem.

Harry

[Harry King]

Hi Wilson,

The multiple threads feature has been corrected in release 2026-04.

Harry

[WILSON TRIGUEIRO DE SOUSA JÚNIOR]

Hi Harry,

Tested the multi-thread and worked fine.
Thanks a lot!

Kind regards,