Library /sys$common/syshlp/dbg$help.hlb DEBUG, Messages, LOOPINCR  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 loop increment cannot be zero

    Facility: DEBUG, VMS Debugger

    Explanation: The loop increment specified on the FOR command is
    zero.

    User Action: Change the loop increment to be a non-zero value.