Just upgraded to Composer XE 2011 and code that compiled in IVF 9 through 11 but not fails with the error message:
error #6897: An interface-block in a subprogram must not contain an interface-body for a procedure defined by that subprogram.
I cannot find any help on this error. The source file only contains a single interface block with several interface definitions and the compiler error is thrown for only some of the routine definitions.