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

  ERROR - An OPEN statement  specifies  a  segmented  key  containing  a
  numeric variable.  For example:

       10 OPEN "INDEX.DAT" AS FILE #1, ORGANIZATION INDEXED, &
             PRIMARY KEY (A$, B$, C%), MAP ABC

  Specify only string variables in segmented keys.