E0004 — DimensionMismatch (sim) - THRINDEX

E0004: layer dimension mismatch

What happened

Layer N in the artifact declares expected input features, but the preceding layer N-1 produces got output features. The two cannot be connected.

Why

The artifact is corrupt. This error should not occur if the artifact was produced by thx.compile(), because the compiler’s validate pass catches dimension mismatches at compile time with E0106. If you see E0004 at run time, the artifact was likely modified after compilation.

How to fix

Recompile the model from scratch: thx.compile(model, "model.thx").
Verify artifact integrity before reporting a bug: thrindex doctor --check model.thx.
If doctor --check reports a CRC32 mismatch, you will see E0009 as well — the artifact was tampered with.

Example

E0004: layer dimension mismatch at layer 2
Why: layer 2 expects 512 input features but receives 256 from layer 1.
Fix: recompile the model — the artifact may be corrupt.
Docs: https://docs.thrindex.com/errors/E0004

E0106 — the compiler-time version of this error
E0009 — CRC32 mismatch indicating tampering