How to avoid output file and error lines when condition does not match

Hi Experts A customer want to send purchase order files to several vendors and each vendor has their own requirement to content and file format. I have prepared scenarios for each vendor and a template is (conditionally) called when CardCode matches. It works fine, - PO file is generated when CardCode matches, but error lines are written to SAP B1 Control Center each time CardCode does not match the one defined in a scenario (100 or more times per day). Problem is that these error lines does not get automatic deleted. Conditional processing are made in this way: I have tried to avoid this by defining a no error lines are written to SAP B1 Control Center, but an empty file is generated when CardCode does not match the one defined in the scenario.