A notebook's very first cell reads from a Lakehouse table that holds newly digitized artifact metadata, and it fails immediately, reporting that the table cannot be found, even though the engineer can see the table listed in the Lakehouse explorer. The notebook that is supposed to create this table each night runs later in the same pipeline, after this one. What is the most likely root cause?
Select an answer to reveal the explanation.
Short Explanation
Seeing a table in the explorer today doesn't prove it existed at the exact moment last night's run tried to read it. If the notebook that builds the table runs after the notebook that reads it, the reader is showing up to an empty room — the table gets created later, once the damage is already done.
Full Explanation
This scenario states plainly that the notebook creating the table runs later in the same pipeline than the notebook reading it, which is a direct ordering problem: at the moment the reading notebook executes, the table genuinely does not exist yet, and Fabric correctly reports that it cannot find it. Seeing the table in the Lakehouse explorer afterward only reflects the pipeline's eventual, correct end state once the creating notebook has since run; it says nothing about the table's existence at the earlier point in time when the failure occurred. A firewall or network access issue would typically block the notebook from reaching the Lakehouse at all, producing a connectivity-style failure rather than a specific this-object-cannot-be-found response tied to one table name. Too few executor nodes affects how slowly or how much data a notebook can process, not whether a named table exists to be read. A genuine misspelling is possible in general, but the scenario explicitly hands you the real cause: the dependency order, not the identifier's spelling, so the ordering explanation should be preferred as the most likely one here. The concrete check is to review the pipeline's execution order or trigger configuration and correct the sequence so the table-creating notebook always completes before anything reads from it.