I tried to replicate this error just now. It happened one time, removing 3 out of 9 named reroutes.
I’m running 5.5.4
- Didn’t break afterwards no matter what I did.
- Didn’t happen again when creating more material functions (made 5 more, all worked).
- None of material functions broke when re-opened the engine.
- None of material functions broke when re-booted my machine.
- Tried other engine versions, worked every time.
- Tried several other projects (in different engine versions, all worked).
Anyone has a reliable way of re-producing this each time?