Your regex is fine, but you didn't escape the $$ initialy. This works for me. 

  use strict;

  my $a;

  $a = "\$\$NETOBJ.parameter";

  $a =~ s/\$\$NETOBJ\.//;

  print $a;

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In reply to Re: Need help with s/// by c-era
in thread Need help with s/// by Tii

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