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In my drawings I use a diesel expression to extract from the filename, only the final part that contains the client code. Now I made a better version of it, but I don't know how to replace it quickly in my drawings, using a lisp. I use: $(substr,$(getvar,dwgname),$(-,$(strlen,$(getvar,dwgname)),9),6) "Name of customer_24-999.dwg" -> 24-999 <--- OK "Name of customer_24-1000.dwg" -> 4-1000 <---- Error I solved it with: $(if,$(substr,$(getvar,dwgname),$(-,$(strlen,$(getvar,dwgname)),7),1)"1",$(substr,$(getvar,dwgname),$(-,$(strlen,$(getvar,dwgname)),10),7),$(substr,$(getvar,dwgname),$(-,$(strlen,$(getvar,dwgname)),9),6)) "Name of customer_24-999.dwg" -> 24-999 <--- OK "Name of customer_24-1000.dwg" -> 24-1000 <--- OK If I try to extract DXF data I only get the text string (24-999) not the Diesel expression that creates it! Prova. 24-999.dwg Prova. 24-1000.dwg