Hello
Flag T001L-XRESS is set automatically when a storage location is assigned to the resource.
If there was no resouce assigned to this storage location, this error message should not be triggered.
Please search again on table CRHD for resouces where this storage location is assigned to field LGORT_RES.
If you can't find anything, try to set a break-point on the above mentioned source code, to find out what is the resource.
BR
Caetano