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Our tools library is written in C++ which means if you wish to include the headers in an Objective-C file, you must rename the extension of your source file to .mm. I believe the default files created with the OpenGL-ES template are Objective-C .m files, and not Objective-C++ .mm (hence why the compiler is complaining about C++ functionality such as templates).
Hope this helps.
Thanks for your prompt reply... It works!