Error 0x8004533D

Value: -2147200195 | 0x8004533D | 2147767101

What does it mean ?

FSRM_E_CLASSIFICATION_ALREADY_RUNNING  
A classification job is currently running. Only one classification job can be running at a time.
Value: 21309 | 0x533D | 0b0101001100111101

Where does it come from ?

FACILITY_ITF  
COM/OLE Interface management. FACILITY_ITF is designated for user-defined error codes returned from interface methods
Value: 4 | 0x004 | 0b00000100

Other Errors for FACILITY_ITF