DUPEXTERN

Message        The declaration of "<name1>" will map to the same
               external name as the declaration of "<name2>" at
               <where>.

Description    The compiler has detected a case where two different
               names in a program will map to the same external name
               in the output object file.  This can cause
               unpredictable results at runtime.  This will most
               often happen when the /NAMES=UPPERCASE or
               /NAMES=LOWERCASE qualifier causes two names with
               different case spellings to map to the same external
               name.

User Action    Either use the /NAMES=AS_IS qualifier, or modify one
               of the names.