Deadlock When Importing Modules in the “Calc Results by Python” Step

Symptom:

When the script run by the “Calc Results by Python” Step imported a module, the following error message appeared when the Step was executed: DeadlockError: deadlock detected.

Possible Cause:

When importing modules in Python, locks are acquired sequentially along the module chain, and the corresponding C extension modules are called. If there are circular dependencies during the import process, the module locks may wait for each other, which can result in a deadlock.

Workaround:

Move the call of the relevant module earlier in the execution order.