Matt,
welcome wmusers!
Please take a moment and register your self in this site.
If you dont use EDI TPA functionality then follow this way.
webMethods EDI will automatically generate the ISA/GS control #'s sequentially when you use the addGroupEnvelope(initialize the input param “grpCtlNumber”),addICEnvelope (initialize the input param “ctlNumber”)and you can also customize this format (max length is 9) using pub.string:numericFormat service and set pattern(000000000).
Please let us know if you have any further questions.
HTH,
#Integration-Server-and-ESB#edi#webMethods