OpenCart Contribution – Fixing auto invoice not generated
The issue, in OpenCart 18.104.22.168, is that after order confirmation, no invoice is generated for the customer.
This issue is actually due to the reason that auto invoice generation code is missing from latest version of OC.
We have fixed it and posted for benefit of community here: http://forum.opencart.com/viewtopic.php?t=48732
Let us know if you find it useful.