That snippet of code contains errors. The following snippet of code works as expected. Perhaps you could modify it to show your problem?

use strict;
use warnings;

my $str = ";123;1;Stand_method;'SMRxsxtxmx1234x1234x12x123­1.'";

print "ok" if defined $str && $str =~ /;(\d{1,3});\d{1,3};Stand_method
+;'SMRxsxtxmx(\d\d\d\d)x(\d\d\d\d)x(\d\d)x(\d\d\d­\d).{0,10}'/;
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Prints:

ok
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