Error stdarg.h not found

Good Morning,

Recently I downloaded the latest trial version of RAD to evaluate it in order to program against IOS or choose other development options.

After configuring the system and obtaining the necessary SDKS I have a problem when building my first IOS program.

RAD gives me the following error:

stdarg.h not found.

How is it possible? I have seen that there are some patches that apparently solve this (30797), but I can not download them.

Is it possible to work with RAD against IOS and MAC OSX?

I have downloaded the latest versions of RAD, XCODE and PAServer.

Thank you,
Javier.