Hello All, did anyone already hit against a NT_STATUS_ALLOTTED_SPACE_EXCEEDED return code after calling PcRegisterSubdevice ? My code runs fine until I try to register the 8'th subdevice (I register a wave and a topology miniport for each subdevice). is there a limitation in the number of miniports that may be registered to portclass ? regards, Marc Titinger. You can find Digigram at: BIRTV, Beijing, China, August 25 - 28, 2005, Booth number: 2068 IBC, Amsterdam, Netherlands, September 9-13 2005, Booth number: 8.257 PLASA, London, UK, September 11-14 2005, EtherSound booth number: AA3