> For the complete documentation index, see [llms.txt](https://docs.sannybuilder.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sannybuilder.com/troubleshooting/errors/0010.md).

# 0010: Unknown opcode

The compiler finds an opcode that has not been defined in the [INI file](/edit-modes/opcodes-list-scm.ini.md).

**Possible solutions:** update the code to use the known opcode. If you're sure this opcode exists, update opcode definitions or use the [`$OPCODE`](/language/directives.md#usdopcode) directive to let the compiler know how to compile it.