/LEVEL=value
       /NOLEVEL

    The higher the integer value, the greater the volume of debugging
    output. Integer values of the range of zero (0) to ten (10) are
    typical, with /LEVEL=0 and /NOLEVEL disabling the debugging, and
    /LEVEL=10 providing substantial debugging output.

    The DEBUG command enables various integrated debugging display
    capabilities. The output of this command is not intended for
    general use nor for general viewing, and the command and the
    output and the output format are all subject to change or to
    removal without notice.

    DEBUG/LEVEL=5