What is

Unknown status / error value

 

Could be also:

ConstantTypeOS
ERROR_MOD_NOT_FOUNDWin32 errorWindows
EADDRNOTAVAILerrnoSolaris
ENOTCONNerrnoWindows

SYSTEM_THREAD_EXCEPTION_NOT_HANDLED

The SYSTEM_THREAD_EXCEPTION_NOT_HANDLED bug check has a value of 0x0000007E. This bug check indicates that a system thread generated an exception that the error handler did not catch.

Important

This topic is for programmers. If you are a customer who has received a blue screen error code while using your computer, see Troubleshoot blue screen errors.

SYSTEM_THREAD_EXCEPTION_NOT_HANDLED parameters

Parameter Description

1

The exception code that was not handled.

2

The address where the exception occurred.

3

The address of the exception record.

4

The address of the context record.

Cause

This bug check indicates that a system thread generated an exception that the error handler did not catch. To interpret it, you must identify which exception was generated.

Common exception codes include the following:

  • 0x80000002: STATUS_DATATYPE_MISALIGNMENT indicates an unaligned data reference was encountered.

  • 0x80000003: STATUS_BREAKPOINT indicates a breakpoint or ASSERT was encountered when no kernel debugger was attached to the system.

  • 0xC0000005: STATUS_ACCESS_VIOLATION indicates a memory access violation occurred.

For a complete list of exception codes, see NTSTATUS values. The exception codes are defined in ntstatus.h, a header file provided by the Windows Driver Kit. (For more info, see Header files in the Windows Driver Kit).

Resolution

If you plan to debug this problem, the exception address (parameter 2) should identify the driver or function that caused this problem.

If a driver is listed by name within the bug check message, disable or remove that driver. If the issue is narrowed down to a single driver, set breakpoints and single-step forward in code to locate the failure and gain insight into events leading up to the crash.

The !analyze debugger extension displays information about the bug check and can be helpful in determining the root cause.

Additional analysis can be done by using the !thread extension, as well as the dds, dps, and dqs (display words and symbols) commands. This can be a reasonable technique when WinDbg reports "Probably caused by : ntkrnlmp.exe."

If exception code 0x80000003 occurs, a hard-coded breakpoint or assertion was hit, but the system was started with the /NODEBUG switch. This problem should not occur frequently. If it occurs repeatedly, make sure that a kernel debugger is connected and the system is started with the /DEBUG switch.

If exception code 0x80000002 occurs, the trap frame supplies additional information.

For more information about WinDbg and !analyze, see the following topics:

Remarks

If you are not equipped to use the Windows debugger to work on this problem, you should use some basic troubleshooting techniques:

  • Check the System Log in Event Viewer for additional error messages that might help identify the device or driver that is causing bug check 0x7E.

  • If a driver is identified in the bug check message, disable the driver or check with the manufacturer for driver updates.

  • Check with your hardware vendor for any ACPI or other firmware updates. Hardware issues, such as system incompatibilities, memory conflicts, and IRQ conflicts can also generate this error.

  • You can also disable memory caching/shadowing of the BIOS to try to resolve the error. Also run hardware diagnostics that the system manufacturer supplies.

  • Confirm that any new hardware that is installed is compatible with the installed version of Windows. For example, you can get information about required hardware at Windows 10 Specifications.

For additional general troubleshooting information, see Blue screen data.

About “What is” service

Many of users are faced with the problem of interpreting errors that occur during the work of operating systems. In some cases, the operating system reports that an error has occurred and displays only an integer error code value. Often it is difficult to even roughly understand the cause of the error from the information given out. Our “what is” service contains a database of errors in Windows, Linux, Macos and Solaris operating systems. The database contains tens of thousands of values. In most cases, the online service will be able to help with the definition of the short name of the error and its detailed description.

Categories

Current version of service supports following types of error and status codes:

NTSTATUSMany kernel-mode standard driver routines and driver support routines use the NTSTATUS type for return values. Additionally, drivers provide an NTSTATUS-typed value in an IRP’s IO_STATUS_BLOCK structure when completing IRPs. The NTSTATUS type is defined in Ntdef.h, and system-supplied status codes are defined in Ntstatus.h.
Win32 errorWin32 error codes MUST be in the range 0x0000 to 0xFFFF, although Win32 error codes can be used both in 16-bit fields (such as within the HRESULT type specified in section 2.1) as well as 32-bit fields. Most values also have a default message defined, which can be used to map the value to a human-readable text message; when this is done, the Win32 error code is also known as a message identifier.
HRESULTHRESULT is a data type used in Windows operating systems, and the earlier IBM/Microsoft OS/2 operating system, to represent error conditions, and warning conditions.
The original purpose of HRESULTs was to formally lay out ranges of error codes for both public and Microsoft internal use in order to prevent collisions between error codes in different subsystems of the OS/2 operating system.
HRESULTs are numerical error codes. Various bits within an HRESULT encode information about the nature of the error code, and where it came from.
HRESULT error codes are most commonly encountered in COM programming, where they form the basis for a standardized COM error handling convention.
HTTP Status CodeHypertext Transfer Protocol (HTTP) response status codes. Status codes are issued by a server in response to a client’s request made to the server. It includes codes from IETF Request for Comments (RFCs), other specifications, and some additional codes used in some common applications of the HTTP. The first digit of the status code specifies one of five standard classes of responses. The message phrases shown are typical, but any human-readable alternative may be provided.
errnoInteger value, which is returned by system calls and some library functions in the event of an error to indicate what went wrong. errno is defined by the ISO C standard to be a modifiable lvalue of type int, and must not be explicitly declared; errno may be a macro. errno is thread-local; setting it in one thread does not affect its value in any other thread.
Kern ReturnApple Kernel return codes.
Ipp StatusThe IppStatus constant enumerates the status values returned by the Intel IPP functions, indicating
whether the operation is error-free.

Source code

The service is based on the open source library AllStat. Its sources are available on our git server. We will be grateful for your participation in the finalization of the library and ideas for the development of the service. You can also download ErrorLookup utility and libraries from our site.