Hello,

Invoice Manager works stand-alone in my Joomla. However, as soon as I activate the plugin "Invoice Manager for VirtueMart" my clients can not finish their orders. This is the error message they get:

Error 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1 SQL=SELECT state_name FROM #__virtuemart_states WHERE virtuemart_state_id ="

In the virtuemart backend I also can not change the order states after activating the plugin.

PHP-Version 5.6.30
Joomla! 3.6.5
VirtueMart 3.0.18
Language de-DE

In the administration panel of your plugin I see some translated strings and some that aren't (see attached screenshot). I don't suppose that is the cause of the problem, still I wanted to mention it.

Please, can you help? I really need to switch my virtuemart shop to online-based invoices. But it is reducing my workload only if the invoices are generated automatically.

Regards