title: the troubleshooting entry for this error
source: manuals/miles-101/sections/7-1-troubleshoot-by-symptom.md
lines: 41-45
lang: text
note: Cause, check and fix in three lines.
---
## The trainer rejects the attention implementation

- **Cause:** a trainer attention name that the installed transformers library does not accept, such as `triton`.
- **Check:** a `ValueError` that lists the attention implementations transformers accepts.
- **Fix:** pick one from that list. On our GB10 we left the trainer setting at its default.
