Getting Error: This process has been inactive for a time period exceeding defined limits

Please find below scenario:

There is a scenario where we need to generate tasks depending the data present in a CDT. If CDT is of length 3 then, we are generating 3(A,B,C say) tasks. Out of these tasks, suppose I have started working on A and B and have not started working on C after some time The C task is getting paused by exception which is: This process has been inactive for a time period exceeding defined limits

What should I check to identify the exact issue.

Please find details which we have used in MNI 

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