' - quoted strings do not interpolate $variables. You'll want to use " (double quotes): 
$rcs->co("-r $version");

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"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re: How to correct my error in my code which uses Rcs.pm by Joost
in thread How to correct my error in my code which uses Rcs.pm by srins

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