too many variants to allow csv download

Hi,

I'm afraid we can't help you with excel problems unfortunately as it's not our speciality. Looking a bit around, it sounds like it's only a problem in Excel 2003 and previous versions:
www.cpearson.com/excel/ImportBigFiles.aspx

You would have to remove the line:
$columns='price_min_quantity';

and change the code:
if(empty($values)){
echo '""'.$separator.'""'.$separator.'""'.$separator.'""'.$separator;
}else{
echo '"'.implode('|',$values).'"'.$separator.'"'.implode('|',$codes).'"'.$separator.'"'.implode('|',$qtys).'"'.$separator.'"'.implode('|',$accesses).'"'.$separator;
}

to:
if(empty($values)){
echo '""'.$separator.'""'.$separator.'""'.$separator;
}else{
echo '"'.implode('|',$values).'"'.$separator.'"'.implode('|',$codes).'"'.$separator.'"'.implode('|',$accesses).'"'.$separator;
}