What does HRESULT 0x80040E75 (DB_E_MISMATCHEDPROVIDER) mean?

 
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DB_E_NOPROVIDERSREGISTERED DB_E_BADCOMMANDID

DB_E_MISMATCHEDPROVIDER

Initialization string specifies a provider that does not match the active provider

Exact value and result class

DB_E_MISMATCHEDPROVIDER has unsigned value 2147749493 (0x80040E75) and signed 32-bit value -2147217803. AllStat describes it as “Initialization string specifies a provider that does not match the active provider”. In this result, an initialization string names a provider different from the provider represented by the active data source object.

The high bit is set, so DB_E_MISMATCHEDPROVIDER is a failure HRESULT. Its facility is 4 (FACILITY_ITF) and its low code is 3701 (0x0E75). For DB_E_MISMATCHEDPROVIDER, these fields identify an interface-defined result family; they do not identify the provider instance, method, object generation or partial effects.

Contract boundary

For DB_E_MISMATCHEDPROVIDER, OLE DB initialization strings select a provider and set initialization properties before IDBInitialize::Initialize. For DB_E_MISMATCHEDPROVIDER, syntax errors, missing provider registration and a provider mismatch are distinct from server connectivity and authentication failures.

Investigation of DB_E_MISMATCHEDPROVIDER should start with the uninitialized data source object, parsed initialization properties and provider CLSID or ProgID. Capture DB_E_MISMATCHEDPROVIDER before ADO, ATL, .NET or a database abstraction layer replaces the native HRESULT with a generic exception.

Evidence to collect

A useful DB_E_MISMATCHEDPROVIDER event records provider CLSID and version, process architecture, interface IID and method, object correlation ID, transaction state and the immediately preceding HRESULT. When recording DB_E_MISMATCHEDPROVIDER data involving passwords, tokens, server names and complete connection strings, use types, lengths, hashes or redacted identifiers rather than secrets or complete business data.

  • Evidence 1 for DB_E_MISMATCHEDPROVIDER: active provider CLSID and ProgID.
  • Evidence 2 for DB_E_MISMATCHEDPROVIDER: provider specified by the parsed string.
  • Evidence 3 for DB_E_MISMATCHEDPROVIDER: factory or pool key that created the data source object.

Conditions that specifically lead to this result

  • Cause 1 for DB_E_MISMATCHEDPROVIDER: a generic connection string is applied to a precreated provider object.
  • Cause 2 for DB_E_MISMATCHEDPROVIDER: pool metadata and connection-string provider fields diverged.
  • Cause 3 for DB_E_MISMATCHEDPROVIDER: a wrapper retained a Provider property while switching factories.

Diagnostic sequence

  1. Capture raw 0x80040E75 and symbolic DB_E_MISMATCHEDPROVIDER at the native call boundary.
  2. Identify the exact failing stage for DB_E_MISMATCHEDPROVIDER: an initialization string names a provider different from the provider represented by the active data source object.
  3. Retrieve all OLE DB error records for DB_E_MISMATCHEDPROVIDER before another COM call replaces thread error information.
  4. Compare the live object state and provider-granted capabilities with the input that produced DB_E_MISMATCHEDPROVIDER.
  5. Reduce the DB_E_MISMATCHEDPROVIDER operation to the smallest case that preserves the same init contract.
  6. Apply one evidence-backed correction for DB_E_MISMATCHEDPROVIDER and verify that the result is not merely replaced by a neighboring HRESULT.

Retry and recovery

Retry rule for DB_E_MISMATCHEDPROVIDER: retry after aligning the active data source object with the provider specified by the initialization properties. A DB_E_MISMATCHEDPROVIDER retry is safe only when the relevant input, object generation, capability or external state has changed. Before replaying a modifying call that returned DB_E_MISMATCHEDPROVIDER, determine whether rows, schema objects or URL resources were partially created or changed.

Do not turn DB_E_MISMATCHEDPROVIDER into an unbounded retry loop. Preserve cancellation for DB_E_MISMATCHEDPROVIDER and use a fresh provider object when the failed call may have left local state ambiguous.

Corrective actions

  • Action 1 for DB_E_MISMATCHEDPROVIDER: remove redundant provider selection when using a fixed provider object.
  • Action 2 for DB_E_MISMATCHEDPROVIDER: create the object for the provider named by the string.
  • Action 3 for DB_E_MISMATCHEDPROVIDER: include provider identity in pooling and configuration keys.

Practical scenario

A pool reuses a SQL provider object for a Jet connection string; provider-aware pool keys prevent the mismatch. Keeping DB_E_MISMATCHEDPROVIDER with the method and object state makes this scenario diagnosable instead of reducing it to “database error”.

Developer and operations guidance

Code handling DB_E_MISMATCHEDPROVIDER should release COM objects in ownership order, retain per-row, per-column or per-property statuses, and log granted capabilities rather than only requested options. While handling DB_E_MISMATCHEDPROVIDER, opaque values such as HACCESSOR, HROW, HCHAPTER, DBID components and provider handles must remain scoped to the object that issued them.

Operational dashboards for DB_E_MISMATCHEDPROVIDER should group by provider version, interface, method and normalized failure stage. A DB_E_MISMATCHEDPROVIDER event must not expose passwords, tokens, full connection strings, unrestricted command text or raw row contents.

Difference from nearby HRESULT values

DB_E_BADINITSTRING means the string is malformed, while DB_E_MISMATCHEDPROVIDER means valid properties select a different provider. Telemetry and remediation for DB_E_MISMATCHEDPROVIDER should keep these outcomes distinct.

Official Microsoft references

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