If SINGULAR does not come back to the prompt while calling a user defined procedure, probably a bracket or a " is missing. The easiest way to leave the procedure is to type some brackets or " and then RETURN .
"
3.9.1 ASSUME 3.9.2 Tracing of procedures 3.9.3 Source code debugger 3.9.4 Break points 3.9.5 Printing of data 3.9.6 libparse 3.9.7 option(warn)