Hi - I am unable to do anything in SAS because of I continue to receive this message despite not even doing a merge   ERROR: The format _MERGE was not found or could not be loaded. NOTE: The SAS System stopped processing this step because of errors.   Even if I do a simple code such as    data libname.a (replace=yes); set libname.a; run;   I cannot figure out the source or even find a help topic that is not specifically about formats.  If anyone could suggest a solution, I would be grateful. Thanks   ... View more