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QPARSE_E_EXPECTING_COMMA
The parser expected a comma separator
QPARSE_E_EXPECTING_COMMA is HRESULT 0x80041671. Windows documents it as “Expecting comma.”
Operation and state
This result belongs to legacy Windows query parsing and is returned while reading a list of arguments, properties, ranges or similar elements. The exact condition is: adjacent elements, optional fields, locale commas or a missing close delimiter confuse list boundaries.
Failure paths to examine
Data to collect first
- Record previous element before releasing the relevant objects.
- Associate next token with the exact UTC timestamp and correlation identifier.
- Compare failing and known-good values for nesting depth under the same provider or handler version.
- Record the source and normalization path of locale formatting, not only its display form.
Step-by-step diagnosis
- Capture list type and previous element at the call boundary that returns this result.
- Confirm the operation reached reading a list of arguments, properties, ranges or similar elements with the intended next token.
- record list type, previous complete element, next token and nesting state.
Continuation policy
Serialize validated element arrays with grammar-owned separators. Retrying identical parser bytes cannot succeed; regenerate the specific token or schema pairing that failed.
Limits of this HRESULT
Distinguishing similar results
QPARSE_E_EXPECTING_PAREN may mean the list should close instead.
Developer and administrator guidance
Operational case
An optional rank argument removes the separator before the next item. Structured list serialization fixes all arities.
Official Microsoft references
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