VMS Help UIL, Compile Time Errors, INV_MODULE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  ERROR:  The structure of the module is incorrect.

  USER ACTION:  If there are any syntax errors reported, fix them  and
  recompile.  If the error occurs before the first object declaration,
  check the syntax of the module header for  unwanted  ";"  characters
  after  the  module clauses, for example.  If the error occurs at the
  end of the module, check that the module concludes with  the  clause
  "end module;".