# vfx-expr-invalid

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A `*.vfx.json` emitter's expressions are wrong: a string that does not parse, names something unknown or mixes kinds of value, a target `set` cannot write, more than 64 operations or 4 attributes, or attributes with no `expr` module.

| | |
|---|---|
| Severity | `error` |
| Source | `contract` |
| Offers a fix patch | no |

## Since / changed

See the version chips above and what changed.