Error codes

qd_noErr 0 No error
qd_paramErr -50 Parameter error
qd_memFullErr -108 Out of memory
qd_fnfErr -43 File not found
qd_nsvErr -35 No such volume
qd_dskFullErr -34 Disk is full
qd_dupFNErr -48 Duplicate file name
qd_dirNFErr -120 Directory not found
qd_demoExpiredErr -29001 The demo version has timed out