# X_CORE_THROWER_UNCALLED

## Means

a `@ultimat3/core` export that throws a coded error has no non-test caller

## Typical cause

a refusal nobody receives — `assertEnvExample` was one, deleted in 25.0.0; it reads as protection and protects nothing

## Fix

`bun run scripts/declaration-readers-callers.ts --json`   # after deleting it, calling it, or pinning it as app-facing API with its caller

[CLI and verify](/error-codes#cli-and-verify)