What happens if you do the following within perl? 

`egrep -f temp_qc_file.txt temp_qc_running_file.txt > temp_file.txt`;

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i.e. just a string wihout variables.

If the problem is still there, than check paths. Do you run you perl script from the same location as unix command?

In reply to Re: problem in running UNIX command through perl by ccn
in thread problem in running UNIX command through perl by kprasanna_79

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