hi,
in RobotC the compiler always changes function or variable names by himself, such as:
*Warning*:Substituting similar variable 'Xyz' for 'xyz'. Check spelling and letter case.

this substituting is not C-conform.
C is case-sensitive, and so both variables, Xyz and xyz, may exist besides one another.

Due to C conformity, the compiler should give a hint, but must not change this by himself.

Or is this a user defined adjustment? I didn't find anything anywhere...

This feature is showing how ROBOTC was developed for Education in specific. ROBOTC does this to assist new users who may have a typo in their program by using improper-case structure.

I'll see if there's a way to create an option in the compiler to disable this feature, but don't expect this option to be included in the final 1.30 release... this has been a Day-1 feature of ROBOTC.

In the mean time, just use a different variable name.

hi,
thx for your reply.
As you are selling RobotC as "real C", 1st preference always should be ANSI C compatibility (C99,...) , and NOT educational or didactic intentions.

Language extensions and simplifications are welcome and appreciated, but the basic C (ANSI C 99) language definitions and command sets should always be supported.

After all, a (pre-) compiler hint to "check spelling" would fit, why make an immediate substitution by the compiler ?

But meanwhile I surely will use different file names.