Exception occurred between two microflow objects

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I have an application where a microflow is triggered based on messages received in a java action callback. A java action does this using the Core.execute microflow function. A microflow is run every 5 seconds and more than one sources can invoke it that means this microflow could be invoked multiple times every 5 seconds.  Average execution time of microflow is 40ms.  It caused error on very normal load i.e., 2 microflow invokes every 5 seconds. Error message is below:   MicroflowEngine: Exception occurred between two microflow object executions, microflow 'MyFirstModule.Microflow' is terminated. MicroflowEngine: java.lang.NullPointerException: null  
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Hi Umar,

Did you have a look at the following forum post alreat?

https://forum.mendix.com/link/questions/89025

Based on your description, it seems you're also executing the microflow with no user context. Could the object handling within the microflow you're trying to execute be a problem in you're case?

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