You must have recently upgraded from an earlier verion of SAS. As mentioned in this thread, PROC SHEWHART and many other SAS procedures were upgraded to use ODS graphics in SAS 9.3.  Also in SAS 9.3, ODS GRAPHICS are turned ON by default.   The easiest thing for you to do is to put ODS GRAPHICS OFF; before your PROC SHEWHART call. then everything should work as before. However, I encourage you to try some of the new ODS graphics features. See the SAS/QC documentation, which now lists options for traditional graphics in a separate section from options for ODS graphics. ... View more