in reply to open file error
Further explaining the problem Corion pointed out.
In your code, the string you assign to $run_cmd
"./tpsm -rules tpsm_rulesfile_ubuntu -looprf 0 -stop 10 -pspc 1 >logfile.txt "has a trailing space.
That trailing space is the source of the extra space in $logfile when you do the split.
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