Emaiol template.
Hello.
What version are you using?
Do you get other information there also, eg a duration, the .wav file attachment etc.
Does it always happen, or just on 1 message.
It looks like the CALLER variable is not seing set, this can be turned off in the script to surpress the NOTICE, but I think it will be better to work out why this is happening first.
Try adding this line to the file [install dir] / data / ivr / templates / voicemail / notify.php after the <? prompt: eg :
<?
error_reporting(0);
.. rest of file here