@sarahal wrote: Hi all,   I've been encountering an issue when I run PROC GEE on SAS studio. I have checked my code quite a few times and still receive this error:     ERROR: An exception has been encountered. Please contact technical support and provide them with the following traceback information:   The SAS task name is [GEE (2)] ERROR: Write Access Violation GEE (2) Exception occurred at (0B20F63C) Task Traceback   Post your code here in a code box opened with the forum's {I} icon. Someone may spot something you missed. Best would be to include a small example data set with the variables used as data step code as well.   I know that I can generate such errors for other procedures by using what may look like good code but is really more invalid than SAS saw to write syntax checking for. ... View more