How to handle Microflow with Concurrent execution disallow = true

When calling a microflow which has Concurrent execution disallow = true how does one manage the "exception" when the microflow is already "running"? Having added Error handling on the Call Microflow Action and set it to Custom with Rollback. The exception handling does not catch the Concurrent execution disallow = true exception. What is the proper means to deal with this issue?
1 answers

If you call the microflow A with concurrent execution disallow = true from another microflow B and set the error handling of the action Call Microflow in B to Custom With Rollback and attach a 2nd action setting that as error handler it will nicely catch the concurrency.