DL.DEFINE with TWS

Hello,
I'm working on the TAFJ R17 version of T24.
I am testing the existence of objects (trying to extract them) by executing this OFS command (via TWS):

DL.DEFINE,/I/PROCESS/1/0/,USERRR/PASSS/GB0010001/////,PACK.TEST1,DESCRIPTN:1:1="XXX",SHORT.DESC:1:1="XXX",LANGUAGE.COUNTRY:1:1="FR",OPERATION:1:1="S",SELECT.LIST:1:1="PACK.TEST1.txt",

If all the records mentioned in the PACK.TEST.txt file exist on the environment, then the command will be executed successfully.
If one or more records mentioned in the PACK.TEST.txt file do not exist on the environment, the TWS returns this error message: TAFJERR-1005: STOP Statement
Please, how can I know which objects do not exist on the environment?
I thank you in advance

try to enable logging to full on OFS source and check OFS.REQUEST.DETAIL file