What does Windows error code 640 (ERROR_MULTIPLE_FAULT_VIOLATION) mean?

ERROR_MULTIPLE_FAULT_VIOLATION

ERROR_MULTIPLE_FAULT_VIOLATION is Windows system result 640 (0x00000280).

How to classify the result

This result represents a low-level fault or exception marker with intentionally sparse public semantics. The correct interpretation depends on the first exception, processor context, or kernel component that translated its internal condition to code 640.

Where it can appear

• This result can appear in crash or exception reporting after more than one fault condition.
• It can appear in a compatibility or kernel boundary that maps a native status to Win32.
• It can appear in diagnostic software reading a stored result rather than a normal API return.

Typical causes

• a second fault occurred while handling an earlier fault.
• corrupted execution state caused several exception conditions.
• a hardware, driver, or runtime component emitted an internal marker.
• the original detailed status was lost during translation.
• Test or verifier instrumentation deliberately exercised a nested-fault path.

Useful evidence

• Record first exception code and parameters.
• Record instruction pointer and stack trace.
• Record process, thread, module, and driver versions.
• Record WER report or kernel dump identifier.
• Record hardware error and verifier records preceding code 640.

Recovery and retry

Recover by correcting the first demonstrated fault or corrupting component; code 640 itself does not specify a standalone remediation.

Blind retry is unsafe when execution state may be corrupted. Restart the affected process or system only after preserving evidence, then test the suspected fix under controlled load.

Difference from related results

It should not be confused with ordinary access violations or floating-point multiple-fault statuses. Preserve the original exception domain whenever available.

Example

A service crash report contains only code 640 after an exception filter itself faults. The dump reveals the initial invalid pointer and the secondary failure in logging code; fixing the first pointer and hardening the filter removes the marker.

Developer and administrator guidance

Applications should never manufacture this value as a generic “multiple errors” code. Incident tooling should prioritize dump collection and retain the native exception chain.

References

• Microsoft: System Error Codes 500–999
• Microsoft: Windows Error Reporting
• Microsoft: Analyze a kernel dump with WinDbg