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

  Data format error (ERR=50)

  The program specifies a data type in an INPUT or READ  statement  that
  does  not  agree  with  the  value supplied.  Change the INPUT or READ
  statement, or supply data of the correct type.