SymUIAgent log not logging or flushing

 

Received message from Console:

SymUIAgent:  SymUIAgent log mgr - plug-in 'fw   ' got error 21 logging

SymUIAgent:  SymUIAgent log mgr - plug-in 'fw   ' got error 21 flushing

This is a little beyond my level of expertise to completely understand, therefore to fix.

Would appreciate a helping hand here.

Thanks.

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Running NIS 5 on iMac 27 (late 2013) OS X 10.10.2