in reply to Re^2: qx(....) suddenly failing
in thread qx(....) suddenly failing

On linux, I'd use strace to see what's happening under the hood. I don't know if there's a similar tool for Windows.

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Re^4: qx(....) suddenly failing
by salva (Canon) on Jun 30, 2010 at 16:41 UTC
      I used Sysinternals' ProcessExplorer to check whether there are an unreasonable high number of handles or threads used, but nothing different from a "good" case. I will check out Process Monitor.

      Ah, one more thing which is different between the hosts where the failure suddenly occured, and the hosts where it runs well: The "failing" hosts are virtual ones (i.e. virtual machines), while the "good" hosts are real machines.

      -- 
      Ronald Fischer <ynnor@mm.st>