SAP Message UACC031 - Invalid command &1 during upload

Diagnosis
Upload command &v1& is invalid and cannot be processed.

System Response
Command &v1& is skipped.

Procedure
Instead use one of the following valid upload commands if possible:
'00_INS_O',,,,- Create an object
'01_INS_HO',,,,- Create a hierarchy object (for structuring)
'10_UPD_O',,,,- Change an object
'11_UPD_HO',,- Change a hierarchy object
'20_DEL_O',,,,- Delete an object
'30_INS_N',,,,- Create a node
'40_UPD_N',,,,- Change a node
'50_DEL_N',,,,- Delete a node
'60_INS_E',,,,- Create a link
'61_INS_HE',,,,- Create a hierarchy link (the receiver must be ahierarchy object)
'70_UPD_E',,,,- Change a link
'80_DEL_E',,,,- Delete a link
'90_WRT_CC',,- Write a cost component split
'A0_INS_TLI',,,,- Create a table line
'B0_UPD_TLI',,- Change a table line
'C0_DEL_TLI',,- Delete a table line