Macintosh error messages
Caution: a system error may be misleading and send you off in the wrong direction!

Error # Definition Cause Solution
ID 1 Bus Error A memory-related error. Make more RAM available.
ID 2 Address Error Incorrect memory address. Check for extension conflict or currepted program preferences.
ID 3 Illegal Instuction A possible programming error. Check for an application or system extension conflict
ID 4 Zero Divide Error A programming error; a remnant of a routine step in the error checking process. Check for an application or system extension conflict
ID 5 Range Check Error Another programming error; the number isn't within the range required for the program. Check for an application or system extension conflict
ID 6 Overflow Error Another programming error; a number used for calculation is too big for the space set aside in the program. Check for an application or system extension conflict
ID 7 Privilege Violation This is strictly a programming issue.  Nothing to be concerned about (usually) with a released product.
ID 8 Trace Mode Error This is an indication that your Mac has apparently stumbled into a programming mode.
ID 9 Line 1010 Trap Error Similar to ID 3; an instruction in your Mac's CPU doesn't understand. Probably due to app. or sys. ext. conflict. Check for an application or system extension conflict
ID 10 Line 1111 Trap Error Similar to ID 9 and ID 3. A possible app or sys. ext. conflict. Check for an application or system extension conflict
ID 11 Hardware Exception Error This is a generic system error, which appears only on Power Macs on Mac OS earlier than 7.6 like a Type 1 error, a general system or application conflict. Check for an application or system extension conflict
ID 12 Unimplemented Core Routine Similar to ID4; a relic of a programming error. Possible due to an app. or sys. ext. conflict Check for an application or system extension conflict
ID 13 Uninstalled Interrupt This message indicated that you Mac cannot communicate with a peripheral device like a disk-drive.
ID 15 Segment Loader Error You won't see this on Power PC Macs as the error dates back to the 680x0 Macs and indicated that part of the program didn't properly load into memory.
ID 17 Missing Package This indicates that a specific component of your system software is missing. Do a clean install of Mac OS
ID 27
ID 30
ID 31
ID 25 Memory Full Error Either your Mac doesn't have enough memory to run a program or perform a function, or there's a software conflict that's memory related.
ID 26 Bad Program Launch The program you attempted to launch isn't running properly. Try reinstalling the application or at least delete its preference file.
ID 20 Stack Ran into Heap A memory error similar to ID 25
-34 Disk Is Full   Clear out disk space or copy file to another drive.
-37 Bad File Name File appears to be corrupted. Use a backup if possible.
-39 Logical End of File The file is corrupted, usually when a preference file goes bad Replace the file is possible.
-60 Bad Master Directory Block This is a disk directory error. Run disk first aid or another hard-drive diagnostic/repair program to fix it.
-64 Drive Not Installed Cannot read drive or disk. Check drive, update device driver, or check SCSI chain.
-65
-66 Font Substitution Occurred This is a font error, possibly indicating the font you tried to use is missing or damaged. Reinstall the font and try again.
-127 Internal File System Error This indicated your Mac may have serious disk directory damage (or SCSI chain problem). Check SCSI chain and run disk first aid or another hard-drive diagnostic/repair program to fix it.

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