Error in assignID help

[Kilroy232]

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I am new to modding factorio, I have worked on other games and I have used LUA before. I had a quick look for any posts on this error and I didn't come across anything helpful.

Does anyone happen to know what may be causing this issue or how to resolve it? I can post code it necessary.

[L0771]

- "explosive-shell" doesn't exist.
- loads "explosive-shell" after use.
- a recipe returns "explosive-shell" but item doesn't exist.

- "explosive-shell" is a projectile type, but need ammo type...
Some ideas.

EDIT: items differs in case sensitive

[Kilroy232]

I will check it out, thank you very much