Executing a RETURN without a previously executed GOSUB verb.
Executing a RETRY without a prior error branch resulting from a SETERR, ERR=, DOM=, or END=.
Executing an EXITTO without a previously executed GOSUB, FOR, or WHILE verb.
Executing an EXIT from the workspace program.
Attempting to delete or EDIT a line with an active FOR or GOSUB statement, or a line with an active RETRY address.
WEND without prior WHILE.
UNTIL without prior REPEAT.
FNERR while not executing a multi-line function.