Experimental Physics and
Industrial Control System

Hi Andrew, I went back to try using fflush myself and now the machine that failed regularly will not fail at all when reverted! I had come across this issue intermittently before and a re-run usually fixed it, I briefly had this one machine doing it regularly but not anymore :-( Going with   fflush(outFP)   over   fclose(outFP)  is fine with me if we have a reproducible test case that it fixes. An   fclose()   will close the underlying windows handle at that point as well as do a flush, the online windows example seems to do this but i don't know if it is important. Given that we know there are no atexit handles or further things with stdout that msi does it should be safe to use fclose() and that would certainly cover everything on windows.         
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[Merge] ~freddie-akeroyd/epics-base:msi_close_file into epics-base:3.15 Freddie Akeroyd via Core-talk

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