Error 408 - Wrong compiler for this program

Wrong compiler for this program - The compiler you are using is not compatible with the compiler version specified by the #COMPILER metastatement. Use the compiler specified by the #COMPILER metastatement. Another approach would be to change the #COMPILER settings to match your compiler but, this should be done with caution, since the program may no longer work the same way (or at all) with a different compiler.