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ERROR_VID_EXCEEDED_KM_CONTEXT_COUNT_LIMIT
ERROR_VID_EXCEEDED_KM_CONTEXT_COUNT_LIMIT is HRESULT 0xC037001E in the VID kernel-mode client context capacity area of the Windows virtualization stack. It applies to the number of kernel-mode client contexts attached to the VID interface.
Where the result originates
The host reached the context limit. Determine whether the intended software scale is unsupported or whether clients fail to close contexts after VM/device/driver lifecycles.
Neighboring result: KM_INTERFACE_ALREADY_INITIALIZED concerns duplicate initialization of one interface; CONTEXT_COUNT_LIMIT concerns aggregate active kernel clients.
Build an incident record
| Evidence | Why it changes the diagnosis |
|---|---|
| Context inventory | Count active contexts by driver/module, partition, and generation. |
| Open/close balance | Keep successful initialize/open and close/uninitialize totals. |
| Scale trigger | Record VM/device count and the exact client that fails. |
| Driver lifecycle | Note update, unload failure, crash recovery, or repeated initialization. |
Run narrow checks
- Exercise driver start/stop and VM create/delete while tracking context count.
- Close contexts on every partial-initialization failure.
- Avoid one context per transient operation when a documented shared lifetime is intended.
- Collect kernel/Hyper-V traces before reboot.
Interpret three controls
| Control | Interpretation | Hold constant |
|---|---|---|
| Fresh owned object | A clean lifecycle changing this result implicates duplicate initialization, leaked ownership, stale lookup, or incomplete rollback. | Preserve request flags and topology while changing only object instance. |
| Same request on a compatible host | If it follows one host, compare resource limits, topology, build, and inventory before altering VM data. | Use the same request and leave virtual disks unchanged in the result comparison. |
| One operation parameter | Change one count, name, identity, or state transition. If it moves, the selected condition is causal rather than the VM as a whole. | Keep host build, VM ID, and returning operation fixed. |
Keep neighboring states separate
Prove the correction
Active contexts stabilize at the expected topology and return to baseline after all clients stop.
Technical references
- Microsoft Open Specifications: HRESULT values — used to interpret this result.
- Microsoft: Hyper-V architecture — used to interpret this result.
- Microsoft: Hyper-V TLFS — used to interpret this result.
- Microsoft: Hyper-V operational troubleshooting — used to interpret this result.
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