> 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/0075.md).

# 0075: Incorrect hexadecimal value

There is a symbol in the [`HEX..END`](/language/instructions/hex..end.md) statement that is not a hexadecimal numeral. Valid hexadecimal numerals are digits `0` through `9` and letters `A` through `F`. [String literals](/language/data-types.md#string-literals) must be enclosed in double quotes.

**Possible solutions:** change the mentioned value:

```
hex
  Hi  // error, Hi is not hexadecimal
end

hex
  "Hi" // OK
end
```