What happens behind the scene when executing a data flow containing an abap dataflow?

Hi All

I am running a simple job containing an abap dataflow and the job failed with the following error mesage

FIL-080101 Cannot open file </usr/sap/trans/BW_DS/aR3dt.dat>. Check its path and permissions. Of course the user has full access to the mentioned directory. My question is what happens behind the scene when executing a data flow containing an abap dataflow?

Basically I have a datastore connected to a SAP CRM

DataStore

Trace Log after running the job

The abap dataflow run successfully and the zw_users_load_data file is created on /sapmnt/WD1/global/IO/inbound, but the job failed because on permissions issue on /usr/sap/trans/BW_DS/

Error Log

After checking, no file aR3dt.dat is created in the /usr/sap/trans/BW_DS/ directory and therefore the “Check its path and permissions” error.

Could you please suggest what I doing wrong?

Thanks,

Blaiso