Library /sys$common/syshlp/dbg$help.hlb DEBUG, Built in Symbols, %EXC NAME  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Gives you the name of the current exception. This provides a way
    of qualifying exception breaks.

    Example:

    DBG> EVALUATE %EXC_NAME
    "FLTDIV_F"
    DBG> SET BREAK/EXCEPTION WHEN (%EXC_NAME = "FLTDIV_F")