In the SSIS source code the ACE provider error path was given the internal identifier 835 when the product team logged it. It never became a public “error number” like DTS_E_OLEDBERROR (0xC0202009), but the community started referring to the whole symptom as SSIS‑835 . The moniker stuck.

Knowing if this is for a Jira ticket or a clinical protocol will help me refine the technical specifications.

Capture the full SSIS execution log (right‑click the package → Logging → enable SSIS Log Provider for Text Files ) and look for the provider name and error code .