System Failures 01 Re-entrant system call 02 Interrupt not found 03 Too many nested interrupts 04 Unable to allocate NMI 05 Event queue overflow 06 Stack overflow 07 Invalid request code 08 Reserved 09 Memory size less than 64K bytes 0A Invalid volume control block 0B Invalid file control block 0C Invalid allocation block 0D Pathname buffer overflow 0E 0F Invalid buffer number 10 Invalid buffer request Pascal Execution Errors 1 Value range error 2 No procedure in segment table 3 Exit from uncalled procedure 4 Stack overflow 5 Integer overflow 6 Divide by zero 7 NIL pointer reference 8 Program interrupted by user 9 System I/O error 10 User I/O error 11 Unimplemented instruction 12 Floating point error 13 String overflow 14 Program HALT 15 Programmed break-point Pascal I/O Errors 0 No error, normal I/O completion 1 2 Bad unit number 3 Illegal operation (e.g. read from Printer:) 4 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 Ring buffer overflow, input arriving too fast 16 Write protect error, diskette is protected 17 18 19 Too many files open for system to handle 20..31 32 (SOS) Invalid request code 33 34 (SOS) Invalid control parameter list 35 (SOS) Character device not open 36 (SOS) Device not available 37 (SOS) Resource not available 38..43 44 (SOS) Invalid byte count 45 (SOS) Invalid block number 46..47 48..63 (SOS) Device specific error 64 (SOS) Device error, bad address or bad data on diskette 65 (SOS) Too many character files open 66 (SOS) Too many block files open 67 (SOS) Invalid file reference number 68..72 73 (SOS) Directory full 74 (SOS) Incompatible file format 75 (SOS) Unsupported storage type 76 (SOS) Attempted read past end of file 77 (SOS) File position out of range 78 (SOS) Illegal access attempted 79 (SOS) User's buffer too small 80 (SOS) File busy 81 (SOS) Volume format neither SOS nor Apple II 82 83 (SOS) Invalid value in list 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..126 123..127 (SOS) System call error