Diagnosis
When you valuate foreign currency items using the integrated procedure,the system generates an entry in table J_1AINFW_FILES with the keyX_001, and deletes it again after the valuation run has finished.
The table currently contains such an entry, which means that eitheranother integrated run is being executed or the system generated a filein a previous valuation run but could not process it.

Procedure
Wait for the other integrated valuation run to finish or process thefile from the previous run.