VMS Help CC, Messages, OUTVARORDER  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Message        <Context> variable ordering is used in a conversion
                specifier for <function name>.  If variable ordering
                is used, it must be specified for all conversions.

 Description    A conversion specification can contain only one type
                of conversion specification - % or %n$.  Mixing them
                will cause unpredictable behavior.

 User Action    Change the format specification to use only one type
                of conversion specification.