Found entries in the master catalog with names such as SYSYYQQQ.Thhmmss.RA0.jobname.tempfile
Further investigation has shown that these have all come from Endevor jobs.
In the Job output we see things like:
DSN (SYSYYQQQ.Thhmmss.RA0.jobname.tempfile )
STORCLAS (storclas) MGMTCLAS (mgmtclas) DATACLAS (dataclas )
VOL SER NOS= volser
Even you used a storclas for temporary files such as STORCLAS (TEMPVIO) and VOLSER NOS= VIO, some temporary files are catalogued while other are correctly managed.
Notice in your processor that catalogued temporary files are allocated correctly and written to in next step using DISP=MOD.
//C1INIT03 DD DSN=&&tempfile,DISP=(,PASS),MGMTCLAS=mgmtclas,
which indicates this is indeed a temp data set.