# 0011: Unknown opcode

The disassembler finds an opcode that has not been defined in the [INI file](https://docs.sannybuilder.com/edit-modes/opcodes-list-scm.ini).

**Possible solutions:** either update opcode definitions or toggle the [`IGNORE_UNKNOWN`](https://docs.sannybuilder.com/editor/debug-options#ignore_unknown) debug option.\\