Forum Post: How to increase length of left boundary in Silk performer Recording Rule

I want to capture a string having left boundary more that 40 characters using Recording Rule as Silk performer is not accepting more than 40 characters in Recording Rule. It shows last 40 Characters of a left boundary in generated script.

I have tried using Regular expressions option in Recording rule but I am not able to parse anything using that rule.

For Ex : String to be Parse:   <LFAPP_PARTY_<Some String><CANONICALID>12345</CANONICALID>

              String to Capture:                    12345

              Rule Used:                   Based on Parse & Replace by RegExp Boundaries

              Regular Expression used : Left Boundary( RegExp) =<LFAPP.+<CANONICALID>

                                                                Right Boundary( RegExp) =<

I am not able to capture anything using above rule. Please suggest.