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[Condor-users] Job was held. Cannot expand $${Opsys).

I have an executable compiled and running in both windows and linux
and would like to make a condor job that can run on either.  However,
it seems to only be working some of the time.  The rest of the time I
get the following output in my log file:

000 (074.1005.000) 06/06 15:06:33 Job submitted from host: <XX.X.12.45:9636>
012 (074.1005.000) 06/06 16:57:47 Job was held.
	Cannot expand $$(OpSys).
	Code 0 Subcode 0

I have named my two executables avida.LINUX.exe and avida.WINNT51.exe
and included the following executable line in my condor submission

executable = avida.$$(OpSys).exe

If I set up the requirements to only run on LINUX, X86-64 then the job
runs fine.  However, when I set it up to run on windows I sometimes
get the above error (But not all the time).  I can make the error go
away if I hard code the executable to avida.WINNT51.exe but that
defeats the purpose.  I looked though the logs but nothing jumped out
and I am not sure which log I should be focusing on.

My best guess is that there is something configured wrong on one of my
windows nodes which is causing the problem.   I tried googling this in
may different ways but did not find anything similar.  Any hints on
where I should be looking?


- Dirk