Build Succeeded, No Errors, Study not Compiled?  [SOLVED]

Hi,

I'm having this weird situation for a signal I coded (never happened before).

I compile it and it shows no errors + I get the "Build Succeeded" message.

But in the list on the right panel, the signal shows the red Exclamation point, and if I try to apply the signal to a chart, it says it's not compiled.

What can it be?

Thanks a lot!

Copy pasted the code in a new signal, renamed and it works )