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

  ERROR - Out of memory for macro definitions.  The limit on the  number
  of  macros  definitions  has  been  exceeded.   Reduce  the  number of
  %DEFINEs, or %UNDEFINE some previously defined macros.