Summary: Large batches (roughly over 1,500 records) can throw rating errors or have the task cancelled. Run large batches in legacy mode: it is slower but produces far fewer errors, so you do not have to rerun the whole batch.

Problem

A large batch returns many rating errors, or the processing task is cancelled, when the record count is high (seen at roughly over 1,500 records).

Cause

Very large batches run in the standard (non-legacy) path are more likely to hit rating errors or have the task cancelled mid-run. Legacy mode processes the batch in a way that produces fewer errors on large runs. It is slower but more reliable at high volume.

How to check: If your batch is well over about 1,500 records and you are seeing rating errors or a cancelled task, the record count is the likely cause.

Fix

  1. For a batch over roughly 1,500 records, turn on legacy mode before you process.
  2. Run the batch. Expect it to take longer than the standard path.
  3. Review the results; the error count should be much lower than a standard run.
  4. For routine high-volume runs, use legacy mode for large batches instead of rerunning after errors.

What you should see

A large batch run in legacy mode finishes with few or no rating errors, and no processing task is cancelled.

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