FM import parameter - lowercase

Hi,

I need the import parameter in a FM to NOT convert lowercase letters to uppercase.

I have defined the import parameter type a type whose domain has a checkmark in the "lowercase" (RZLLI_APCL).

Despite this, when I run the program I see it gets converted to uppercase, also when I test the FM. (For export parameters this is not the case).

Anyone know if/how it is possible to do this?

(Translating to lowercase in the beginning of the FM source code also will not do because I need to have the ability for combination of upper and lower cases).

Thanks,

Michal