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ERROR - Phython.exe Application Error in Workbench
Authored by Aaron Schedlin
July 3rd, 2026
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KB2220152
ERROR
In this case, running a FSI calculation causes a phython.exe application error.


phython.exe - Application Error
The instruction at 0x00007FFC6F26AD72 referenced memory at 0x0000000000000000. The memory could not be read.
Click on OK to terminate the program
Update failed for the Solution component in System Coupling. The coupling service did not write the remoting configuration file <filepath> after 600 seconds. Unable to connect solvers to coupling service.
Software & Version
Workbench 2021R2
*This example was taken from this version but is not necessarily limited to this version.
Description/Cause
Exact cause is unknown at this time.
Solution
- Solution is unknown at this time, nor do we know if it is version specific.
- If you are a SimuTech customer, please reach out to our support team and we'd be happy to troubleshoot this further with you.