OpenCart Community

V 1.4.9.1

Using the Qphoria Nochex module.

An order shows as missing on the sales order list and has therefore not been processed. However, it turns out that the Nochex payment has been taken succesfully.

Any ideas what might have happened

Probably down to how your server handles the callback post from Nochex - I was ripping my hair out with RealEX problems, in the end it turned out to be how RealEX were posting back to opencart with malformed headers and the Apache mod_security module was seeing it as a false positive "hack attack" and blocking it.

Not exactly the same as you are experiencing and may be wide of the mark but it could be worth looking at.