What does HRESULT 0x00040254 (TPC_S_NO_DATA_TO_PROCESS) mean?

TPC_S_NO_DATA_TO_PROCESS

Tablet PC personalization found no training data

TPC_S_NO_DATA_TO_PROCESS is HRESULT 262740 (0x00040254) from winerror.h. The documented description is “TabletPC inking error code; No personalization update to the recognizer because no training data found.” The high-order severity bit is clear, so this is a success result, but it carries more information than plain S_OK.

The personalization or recognizer update completed without changing the recognizer because no training data was available.

Evidence to preserve

• Preserve training-set item count.
• Preserve recognizer language and capabilities.
• Preserve rejected or filtered samples.
• Preserve user profile and storage location.
• Preserve before-and-after personalization version.

Where the result is encountered

• This result can appear in handwriting personalization workflows; record the producing interface and method.
• This result can appear in recognizer training sessions; record the producing interface and method.
• It can appear in maintenance code submitting collected ink examples; record the producing interface and method.

State to verify

The central question is whether the expected training set actually contains accepted samples in the recognizer’s language and format.

Diagnostic sequence

• Capture the raw HRESULT 0x00040254 immediately after the returning method and record whether the caller used SUCCEEDED, FAILED, equality testing, or exception translation.
• Verify the method-specific state: the expected training set actually contains accepted samples in the recognizer’s language and format.

Difference from nearby HRESULT values

TPC_S_INTERRUPTED indicates work was stopped; it indicates there was nothing eligible to process.

Correct handling, retry, and recovery

Treat the result as a no-op, not a recognizer crash. Ask for additional valid samples or skip the update; repeated submission of the same empty set will not change the outcome.

Practical validation scenario

A scheduled personalization task runs for a new user with no saved handwriting examples. It records the informational result, leaves the recognizer unchanged, and waits until sufficient samples exist.

Developer and administrator guidance

References

• Microsoft: COM success codes
• Microsoft: Pen input, ink, and recognition
• Microsoft: About handwriting recognition