Cheat Sheet for SPPS Syntax Customizing SPSS Environment âÂ?¢ Changing page length to indefinite: SET LENGTH NONE. Programming Errors âÂ?¢ Setting error listing on, maximum number of error messages displayed, turns on the display of warning messages for undefined data: SET ERRORS ON / MXWARNS =100 / UNDEFINED = WARN. Documenting a Data File âÂ?¢ … Continue reading Quick How to Guide to SPSS Syntax