#8221;
occurs during the evaluation of a command substitution, an
empty string is substituted for the command.  Where an uncaught
&#8220;break exception&#8221;
occurs during the evaluation of a command substitution, the
result of the whole substitution on <I>objPtr</I> will be truncated at
the point immediately before the start of the command substitution,
and no characters will be added to the result or substitutions
performed after that point.
<H3><A NAME="M6">SEE ALSO</A></H3>
<B><A HREF="../TclCmd/subst