Include vs User Def Functions Foggy Error

[SkyFrontier]

What does this could possibly mean?

Maximum nesting level (100) for include statements reached.
Line: INCLUDE "_inc\regexescape.xyi";
This script is terminated now.

Nothing looks out of place in both script nor the used User Def. Functions involved, which are public.

[admin]

Check your script again. You seem to have circular include statements...

[SkyFrontier]

I missed your answer, sorry and thanks.
I'll check it out...