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

  DECIMAL error or overflow (ERR=181)

  The result of a DECIMAL expression is greater than  or  requires  more
  precision than can be contained in the variable.  Reduce the magnitude
  of the expression or  increase  the  allowed  digits  in  the  DECIMAL
  variable.