Hi, I must be blind in one and can't see out the other. Can anyone point me to a reference or example how dtml doc receive a new variable from python. <dtml-let pn="''"> <dtml-call concat_sub_type_to_part_num(st1,sub_type2,pn)> <dtml-var st1>st1<dtml-var sub_type2>st2 <dtml-var pn> pn </dtml-let> The script is as suggested by Kevin # Example code: # Import a standard function, and get the HTML request and response objects. pn = "%s%s" % (st1, sub_type2) return pn When I test the variable "pn" I see the results I am looking for by in the DMTL doc it is blank. I know it is a namespace issue. I just cannot figure out the syntax. Thanks in adavnce. Larry McDonnell Proton Energy Systems 50 Inwood Rd. Rocky Hill, CT 06067 (860) 571-6533 ext. 531 Email:lmcdonnell@protonenergy.com www.protonenergy.com