Library /sys$common/syshlp/basichelp.hlb Compile time errors, ATROVRVAR  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  ERROR - A variable  name  appears  in  more  than  one  overlaid  MAP;
  however,  the  attributes specified for the variable are inconsistent.
  If the same variable name  appears  in  multiple  overlaid  MAPs,  the
  attributes (for example, data type) must be identical.