## TL;DR
Fix this in the agent workflow by acting on the exact problem first: split the attempt to build the tail spend report for the quarter into timed batches with a saved result per batch, run the heaviest grouping or comparison as a prepared query or export instead of step by step reasoning over every row, and set the step budget per batch from the batch size so no batch runs open ended. Do not rerun the same operation unchanged, because the same inputs produce the same failure. Prove the fix on one report section or category first, then rerun the full scope and reconcile the results.

```text
agent timed out when agent tried to build the tail spend report for the quarter error timeout failure
```

## Use this when
- The operation in the agent workflow fails with this exact problem: agent timed out when agent tried to build the tail spend report for the quarter error timeout failure.
- The same failure repeats on retry with unchanged inputs.
- Work described as an attempt to build the tail spend report for the quarter is blocked until this is resolved.

## Not for this skill when
- The notice is a platform outage from the vendor. Resolve that first, then return here if this problem remains.
- The operation completes and you only disagree with an analytic or policy judgement in the result. That is an owner decision, not this failure.

## Steps
1. Reproduce the failure on one report section or category in the agent workflow and record the full problem text plus the record, group or period involved. Verify: the failure is reproduced on demand on a named scope, not only seen in a log.
2. Apply the specific fix for this problem: split the attempt to build the tail spend report for the quarter into timed batches with a saved result per batch, run the heaviest grouping or comparison as a prepared query or export instead of step by step reasoning over every row, and set the step budget per batch from the batch size so no batch runs open ended. Verify: the single failing scope now behaves as the fix predicts, or the corrected value is visible on the record.
3. Check neighbouring items, meaning workflow steps and batches that share the same inputs, because this class of failure rarely affects only one scope. Verify: the neighbouring items are listed and each is marked affected or clear.
4. Rerun the original operation in the agent workflow on the previously failing scope, watching for the same problem rather than assuming success from a quiet log. Verify: the operation completes and the original problem does not appear.
5. Compare the result against the source of truth, the source spend data and the published report totals, so a silent partial success is caught. Verify: values match the source or every difference is named and explained.
6. Record the fix, the triggering input and the verification result on the run log so the next occurrence is recognised immediately. Verify: the record names the problem, the fix applied and the evidence of success.

## Variant phrasings

### agent timed out when agent tried to build the tail spend report for the quarter error timeout failure
The verbatim form searchers paste from the console, report or run log. Treat it identically: same fix, same single scope proof, then the full rerun.

### How to fix - agent timed out when agent tried to build the tail spend report for the quarter error timeout failure
The how to phrasing for the same failure in the agent workflow. The steps above apply unchanged; start at the reproduction step rather than skipping to the rerun.

### the agent workflow troubleshooting for this failure
The symptom first phrasing used when the console hides the full problem. Surface the full problem first, confirm it matches the text block above, then follow the steps.

## Why it happens
The work grows faster than the step budget allows when every supplier or category is handled individually, so the attempt to build the tail spend report for the quarter is still mid list when the time limit arrives.

## Edge cases
- The underlying data, mapping or rules changed after the failing run started. Refresh the current state and reapply the fix against the current values, not the values from the failed run.
- The single scope proof passes but the full rerun still fails on other scopes. Treat each remaining failure as its own scope, because a shared rule, filter or schedule can hide more than one cause.
- The source systems disagree on the correct value. The source of truth for this check is the source spend data and the published report totals; record which source won and why.

Compatibility: agent workflow runners and spend analysis tools at current versions, plus Coupa or the spend platform named in the run; no extra tooling beyond access to the run log and the source spend records needed to verify results.

## Provenance

Resolved from the public thread: https://vectle.com/posts/pst_m7bzWViC8W3Ovrx1Ao95Ew