VXML record processing dtmf termchar - voice-recording

Question

I am having trouble processing a dtmf within a record tag.
I am looking to identify the zero entered during recording and perform specific action based on the value. zero could be entered anytime before or after speaking.
With the following snippet I see that when I enter zero, the application exits. It looks like the block tag is reached, but then processing terminates. I am not sure what the problem is here. Or is there a better way to acheive the same?
I also referred the answer here: VoiceXML - Recognize DTMF in Recording, but need more details.
<form id="recordMessage">
<property name="termchar" value="" />
<property name="inputmodes" value="dtmf" />
<var name="lastdtmfchar" expr="1"/>
<record name="recording" beep="true" maxtime="120s" dtmfterm="false" type="audio/wav">
<grammar mode="dtmf" version="1.0" root="dtmfSettings" xmlns="http://www.w3.org/2001/06/grammar">
<rule id="dtmfSettings" >
<one-of>
<item>0</item>
<item>#</item>
</one-of>
</rule>
</grammar>
<filled>
<assign name="lastdtmfchar" expr="recording$.termchar"/>
<if cond = "recording$.termchar == '#'">
<prompt> Hash entered
</prompt>
</if>
<if cond = "recording$.termchar == '0'">
<prompt> zero entered
</prompt>
</if>
</filled>
</record>
<block>
<if cond = "lastdtmfchar == '1'">
<prompt> block value not assigned
</prompt>
</if>
<if cond = "lastdtmfchar == '#'">
<prompt> block hash entered
</prompt>
</if>
<if cond = "lastdtmfchar == '0'">
<prompt> block zero entered
</prompt>
</if>
</block>
There is only this record tag in the form, but the root doc has all the handlers..
<vxml .....>
<catch event="connection.disconnect.hangup">
<goto next="${hangupUrl}?cause=hangup" />
</catch>
<catch event="connection.disconnect">
<goto next="${hangupUrl}?cause=disconnect" />
</catch>
<catch event="error">
<prompt>
<audio src="${goodbyeUrl">
</audio>
</prompt>
<exit/>
</catch>
<catch event="*">
<prompt>
<audio src="${goodbyeUrl">
</audio>
</prompt>
<exit/>
</catch>
<property name="termchar" value="#"/>
<link dtmf="0" next="${globalHandlerUrl}">
</link>
</vxml>

Answer 1

As you mentioned, dtmfterm = false may be the reason.
You can get the grammar matched character by accessing application.lastresult$. Refer http://www.w3.org/TR/voicexml20/#dml2.3.6
Agree with #kevin that in IVRs, a lot of things depend on the vendor itself (using a grammar in record is itself optional in the spec)