"ERROR:EVAL:@reason=index"

Question

We are using a rule in exception in a user input task. When I test the expression in the expression editor it returns true or false. But the process on testing is giving the following info "ERROR:EVAL:@reason=index" Have any of you experienced this error? Any input is greatly appreciated. 
 OriginalPostID-219865 
 OriginalPostID-219865

Jussi Lundstedt · Answer

soujanya B , this is a known limitation of Appian which is documented : " Passing arguments by keyword is not supported when creating rules for the Web Content Channel, process reports, or events. If used, it will cause the process or task to pause by exception. "