Following is a list of errors codes available to the Pascal programmer from the Apple III's Sophisticated Operating System (SOS). -------> Pascal Errors 0 No error; normal I/O completion 1 Out of filename storage space 2 Bad unit number 3 Illegal operation (e.g. read from PRINTER:) 4 Illegal directory spec 5 Lost unit; no longer on line 6 Lost file; file no longer in directory 7 Illegal pathname 8 No room; insufficient space on diskette 9 No unit; unit not on line 10 No such file in specified directory 11 Duplicate pathname 12 Attempt to open an already open file 13 Attempt to access a closed file 14 Bad input format; error in reading number 15 Wrong disk format 16 Write protect error; diskette is protected -------> SOS Device Call Errors 32 (SOS) Invalid request code 33 (SOS) Invalid control/status code 34 (SOS) Invalid control/status parameter list 35 (SOS) Character device not open 36 (SOS) Device not available 37 (SOS) Resource not available 38 (SOS) Invalid operation 39 (SOS) I/O error 42 (SOS) Checksum error 43 (SOS) Device write protected 44 (SOS) Byte count not a multiple of 512 45 (SOS) Block number too large 46 (SOS) Diskette has been switched 48..63 (SOS) Device specific error -------> SOS File Call Errors 64 (SOS) Invalid pathname syntax 65 (SOS) Too many character files open 66 (SOS) Too many block files open 67 (SOS) Invalid file reference number 68 (SOS) Path not found 69 (SOS) Volume not found 70 (SOS) File not found 71 (SOS) Duplicate file name 72 (SOS) Overrun on volume 73 (SOS) Directory full 74 (SOS) Incompatible file format 75 (SOS) Unsupported file storage type 76 (SOS) Attempted read past end of file 77 (SOS) File position out of range 78 (SOS) Access not allowed 79 (SOS) User supplied buffer too small 80 (SOS) File busy 81 (SOS) Volume format neither SOS nor Apple II 82 (SOS) Not a SOS volume 83 (SOS) Invalid length parameter 84 (SOS) Out of memory for SOS system buffer 85 (SOS) Buffer table full 86 (SOS) Invalid system buffer parameter 87 (SOS) Duplicate volume error 88 (SOS) Not a block device 89 (SOS) Invalid level 90 (SOS) Invalid bitmap address found on volume -------> Utility Call Errors 112 Invalid Joy_Mode parameter -------> System Call Errors 123..127 -------> Memory Call Errors 240 Invalid segment address 241 Segment request denied 242 Segment table full 243 Invalid segment number 244 Segment not found 245 Invalid Search_Mode parameter 246 Invalid Change_Mode parameter 247 Invalid pages parameter