SAP Message WC028 - Error opening trigger file & in directory &

Diagnosis
In directory &V2&, no file waas created. The command "Open" was notsuccessfully executed.

System Response
No data will be passed on to thePOS interface.

Procedure
Please ensure that these files can be created. There may not besufficient memory or the directory has not been created on thehard disk.
Then run program RWDPOSTG (online or in batch) so thatthe trigger files can be created.