Hi i have this problem.
When i make an order with 29 products the Vm Invoice work well.
If i have a order with 30 or more diferrent products and i click save the it redirects me to the main screen of joomla administration.
I cannot edit the order or the customer or the quantity nothing.. it makes the same thing again and again.

can someone help me.

best regards

p.s.i have the last version of virtuemart and vminvoice