On a Mac, be sure to fix Disk Permissions with the Apple Disk Utility. A persmission issue will prevent the media encoder from being able to write/change files and encoding will fail.
<Question>
<Answers>
<Answer>
<Content>It.....</Content>
<Reference/>
<Best/>
<UserId>DrMxELRraa</UserId>
<UserNick>Aonghas M</UserNick>
<Date>2010-02-07 23:22:28</Date>
<Timestamp>1265613748</Timestamp>
</Answer>
<Answer>
<Content>Some ....</Content>
<Reference/>
<Best/>
<UserId>aFtEvJdRaa</UserId>
<UserNick>Oscar Wilde</UserNick>
<Date>2010-02-07 23:22:38</Date>
<Timestamp>1265613758</Timestamp>
</Answer>
</Answers>
</Question>
$sxml = simplexml_load_string($xml);
foreach($sxml->Question as $question)
{
$subject = trim($question->Subject);
$link = $question->Link;
//problem here
foreach ($question->Answers as $answers) {
foreach ($answers->Answer as $answer) {
$userID[]=$answer->UserID;
}//end foreach ($answers->answer as $answer)
}// end foreach ($question->answers as $answers)
//also tried
foreach ($sxml->Question->Answers->Answer as $d) {
$userNick[]=$d['UserNick'];}