6
O.K.
Line 175 is this:
$this->vars[$key] = array('value' => $value, 'required' => $required, 'data_type' => $data_type, 'maxlength' => $maxlength, 'changed' => false, 'options' => $options);
Too much data @ once (as I said I have 4500 users).
I don't think 4500 users is a lot, this thing is quite weird.....
I made a test on my local server: in php.ini I doubled execution time and raised memory for scripts (from 8MB to 96MB !!!!) and tried to import users....
After about 10 min. it came back with results (I think it's all the 4500 users)
now I'll drop the tables online and see what will happand