Windows Stop Code SHARED_RESOURCE_CONV_ERROR (0x0000001F): Meaning and Troubleshooting
Quick Answer SHARED_RESOURCE_CONV_ERROR is Windows bug check 0x0000001F. Microsoft says this bug check appears very infrequently. Its dedicated page provides...
Quick Answer
SHARED_RESOURCE_CONV_ERROR is Windows bug check 0x0000001F. Microsoft says this bug check appears very infrequently. Its dedicated page provides the name and value, but does not define the four parameters, describe an exact triggering condition, or prescribe a specific fix. Microsoft Learn
The name suggests an issue involving conversion of a shared resource, but that is not enough to identify the resource or the faulty driver. If this code appeared on a real system, preserve the crash dump and examine it with WinDbg, beginning with !analyze -v and the call stack. Microsoft Learn
What Is a Shared Resource in Kernel Code?
Kernel drivers sometimes protect data with a synchronization object that supports shared and exclusive access. Shared access can permit multiple compatible readers; exclusive access reserves the protected state for one owner.
Windows provides ERESOURCE routines for this form of synchronization. One documented routine, ExConvertExclusiveToSharedLite, changes a resource acquired for exclusive access into one acquired for shared access. This is useful background for reading a driver’s stack, not proof that this particular routine caused a 0x1F crash. Microsoft’s 0x1F entry does not name an API or define what “conversion” means in its bug-check label. Microsoft Learn
The “resource” in the bug-check name should also not automatically be interpreted as a disk, a USB device, or a Windows file-sharing setting.
What Microsoft Documents About 0x1F
| Item | Documented information |
|---|---|
| Bug-check value | 0x0000001F |
| Symbolic name | SHARED_RESOURCE_CONV_ERROR |
| Frequency | Appears very infrequently. |
| Parameter meanings | Not provided on the dedicated 0x1F page. |
| Code-specific cause or fix | Not provided on the dedicated 0x1F page. |
What Might a Developer Investigate?
If the actual crash stack leads into a driver’s resource synchronization code, review that code’s acquisition, conversion, and release sequence. Questions include:
- Was the resource initialized before use?
- Did the thread acquire it in the mode the subsequent operation expects?
- Could an error or cleanup path release it before conversion?
- Could two paths perform cleanup for the same acquisition?
- Does another thread change related state without the required protection?
These are general review questions, not Microsoft’s published causes of SHARED_RESOURCE_CONV_ERROR. Do not assume that an ERESOURCE routine appears in every 0x1F dump. The stack determines whether this line of investigation is relevant.
How to Investigate a Real 0x1F Crash
1. Confirm the exact code
Verify 0x0000001F in the blue-screen record or crash dump. If you copied the row from a reference table, it identifies a stop-code entry rather than a failure on a particular computer.
2. Preserve the memory dump
Keep the dump generated at the time of the crash. It may contain the failing thread, call stack, loaded modules, and bug-check arguments. A screenshot of the symbolic name alone is insufficient to identify a cause.
3. Run WinDbg’s initial analysis
Open the dump in WinDbg:
!analyze -vRecord the exact bug-check value, four arguments, named modules, and stack. Microsoft’s bug-check reference recommends !analyze for displaying available information. Because Microsoft does not publish a parameter table for 0x1F, avoid assigning the arguments fixed meanings based only on their positions. learn.microsoft.com
4. Examine the call stack
Display a detailed stack:
kvIf the stack shows resource acquisition or conversion routines, follow that path into the relevant driver. If it does not, avoid forcing a resource-conversion explanation solely from the stop-code name. Compare multiple dumps, if available, to see whether the same path recurs.
5. Correlate with system changes
Check the System log in Event Viewer and note recent driver, device, firmware, or Windows changes. Use this history to prioritize the dump investigation. A recent update is a lead, not proof of fault.
6. Apply a targeted remedy
If analysis consistently implicates a third-party driver, check the vendor’s supported update or rollback options. If the crash cannot be explained from the available dump, provide the dump and reproduction details to the driver vendor or a Windows debugging specialist.
Guidance for Driver Developers
When the failing path genuinely involves an ERESOURCE, inspect its ownership and access mode at each operation. Microsoft’s ERESOURCE documentation describes routines for acquiring resources in shared or exclusive mode and checking whether a resource has been acquired. The specific conversion routine ExConvertExclusiveToSharedLite requires a resource acquired for exclusive access. Microsoft Learn
Trace all normal and error paths around the resource. A breakpoint or targeted logging in a reproducible test may help establish which thread held it and which operation preceded the halt. This is source-level investigation guided by the dump, not a general fix for every 0x1F report.
Guidance for End Users
There is no supported universal repair for this rare code in Microsoft’s dedicated entry. If the blue screen repeats:
- Keep the dumps and record the time and circumstances of each crash.
- Note any newly installed device or driver.
- Analyse the dumps or provide them to an experienced debugger.
- Update or roll back a driver when the evidence points to it.
Do not alter Windows sharing permissions, network shares, or file ownership merely because the stop-code name contains “SHARED_RESOURCE.” The official reference does not associate this code with those user-facing settings. Microsoft Learn
Frequently Asked Questions
What is SHARED_RESOURCE_CONV_ERROR?
It is the symbolic name for Windows bug check 0x0000001F. Microsoft describes it as appearing very infrequently. Microsoft Learn
Does it mean a network shared folder is broken?
The official 0x1F page does not say that. Do not interpret “shared resource” as a Windows network-share diagnosis without dump evidence. Microsoft Learn
Does it specifically identify an ERESOURCE conversion call?
No. Windows has documented ERESOURCE conversion routines, but Microsoft’s 0x1F page does not identify one as the trigger for this bug check. Inspect the stack to see whether it is relevant. Microsoft Learn
What do the four parameters mean?
Microsoft does not provide a 0x1F-specific parameter table. Record the values from the dump without borrowing definitions from another stop code. Microsoft Learn
Which driver should I update?
The code alone does not name one. Follow the dump’s call stack and repeated crash evidence before selecting a driver.
Can WinDbg fix the problem?
No. WinDbg helps identify the execution path and evidence. The corrective change depends on what that investigation finds.
Summary
SHARED_RESOURCE_CONV_ERROR (0x0000001F) is a very rare Windows bug check with limited official detail. The name suggests a synchronization issue, but it does not document a particular API failure or repair. Confirm the crash in a dump, inspect the stack, and review resource-handling code only where the actual evidence leads. Microsoft Learn
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