CP DEFINE CU .. ???

I don't seem to get this to work. Can anyone see the error of my ways? q chpid ab type Path AB is a FICON unswitched channel Ready; T=0.01/0.01 18:03:27 cp def cu 210 type * unitadd 10-1f path ab HCPCCO6806E Dynamic I/O change request for control unit failed with return code 0105

RES: CP DEFINE CU .. ???

: IBMVM@LISTSERV.UARK.EDU Assunto: CP DEFINE CU .. ??? I don't seem to get this to work. Can anyone see the error of my ways? q chpid ab type Path AB is a FICON unswitched channel Ready; T=0.01/0.01 18:03:27 cp def cu 210 type * unitadd 10-1f path ab HCPCCO6806E Dynamic I/O