The Region of Unmapped Memory Contains An Active Lock

Application Verifier stop message

Locks violation detected. The region of unmapped memory at <location> of size <size> contains an active lock.

Probable cause

This stop is generated if the current thread is calling UnmapViewOfFile on a memory block that contains an active critical section. The application should call DeleteCriticalSection on this critical section before it releases this memory.

Information displayed by Application Verifier in Tool Window

Lock - Critical section address.

Owner - N/A

DebugInfo - N/A

Description - The region of unmapped memory at <location> of size <size> contains an active lock.

Trace Description – Critical Section Initialization

Additional information

The call stack in the tool window shows where the critical section was initialized.

Check the current call stack where the virtual memory is released using UnmapViewOfFile.

Frequency of this error is low.

See Also

Concepts

Lock Verifier