Count the number of network not converged message

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I am trying to analysis critical clearing time of a branch fault, but I got a problem. When I ran simulation with a kinda great clearing time ( that means time of fault is also big), psse returned a lot of Networked not converged and the output file is incorrect. For example, with the same branch-fault, when clearing time = 0.5s, machines' phase angle even oscillated less than with clearing time = 0.2, which, in my opinion, is unreasonable.

I want to know is there anyway to count the number of Networked not converged message appear, so I could know when PSSE go wrong. Thank for your time.