There is a per process OS limit on the number of filehandles ... see FileCache/_setmaxstdio

It might also be a per-process-group limit

Use http://live.sysinternals.com/handle.exe or http://live.sysinternals.com/procexp.exe to examine the process details and open handles before hitting 64 and after

Maybe the program doesn't die, and keeps a lock open to some config file or something, thus blocking subsequent ones ...

In reply to Re: Win32 limit to number of calls to system()? by Anonymous Monk
in thread Win32 limit to number of calls to system()? by Limbic~Region

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