Causes the debugger to break on every instruction that writes to
    and modifies the value of the location indicated by the address
    expression. The address expression is typically a variable name.

    The SET BREAK/MODIFY command acts exactly like a SET WATCH
    command and operates under the same restrictions.

    If you specify an absolute address for the address expression,
    the debugger might not be able to associate the address with
    a particular data object. In this case, the debugger uses a
    default length of 4 bytes. You can change this length, however,
    by setting the type to either WORD (SET TYPE WORD, which changes
    the default length to 2 bytes) or BYTE (SET TYPE BYTE, which
    changes the default length to 1 byte). SET TYPE LONGWORD restores
    the default length of 4 bytes.