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Editorial Team
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Asked: 2026-05-16T22:13:25+00:00

I have a Windows batch script (my.bat) which has the following line: DTBookMonitor.exe 2>&1

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I have a Windows batch script (my.bat) which has the following line:

DTBookMonitor.exe 2>&1 > log\cmdProcessLog.txt

So, from my understanding, this runs DTBookMonitor, redirects STDERR to STDOUT and then redirects STDOUT to the file log\cmdProcessLog.txt.

I then run my.bat. DTBookMonitor runs for a significant amount of time, and when I run my.bat a second time (while it is already running), it immediately exits from the second instance of my.bat.

Is this purely because of the redirection to cmdProcessLog?

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1 Answer

  1. Editorial Team

    I’d guess it’s either due to that, or because DTBookMonitor only allows one instance of it to run at a time. The following test should shed some light on the situation:

    • Run the first (long) instance of DTBookMonitor
    • Run a second instance without redirecting any of its output
    • Alternatively, run a second instance, but redirect the output to a file other than log\cmdProcessLog.txt

    Do you get similar results? Different results?

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