Not all resources are displayed when issuing command - resdef - list lastused(12/11/2017)
Note: Today's date is Dec 11, 2017
CA WA ESP 11.4 Z/OS
If you don't specify the time on criteria, it will be defaulted to 00:00. So if one resource has been used later, then it will not show up. So you should issue RESDEF - LIST LASTUSED(NOW).