IBM Mainframe Forum

Apparently you have SAS /MXG? if so just for grins why not run a SMF report on the 6156's (ICF catalog Facility Activity) for the same time period or just before, maybe someone deleted or renamed the file prior to creating a new datasaet?

**** READ TYPE 6156 RECORDS *********
OPTIONS NOSOURCE NOFMTERR SORT=90;
%INCLUDE SOURCLIB(VMACSMF,VMAC6156);
DATA _VAR6156
_SMF
_CDE6156
RUN;
DATA TEMPA;
SET TYPE6156;
IF ENTRNAME=:'Your.dataset.name';
PROC PRINT;
RUN;