Assignment statement syntax

                                           .-DATALINE-.         
>>-ISREDIT--LINE_BEFORE--+-linenum-+-- = --+----------+--data--><
                         '-label---'       +-INFOLINE-+         
                                           +-MSGLINE--+         
                                           '-NOTELINE-'         

Return codes

 0

Normal completion.

 4

Data truncated.

12

Invalid line number.

20

Severe error.