Same problem here. Opening already generated invoices turns up with error's instead of the .pdf:

<q>
Warning: imagepng() [function.imagepng]: Unable to open '/home/p13762/domains/rams23.eu/public_html/tmp/VM_Facturen/mska_901401932b4376a14ce7c911f8d3f043' for writing: No such file or directory in /home/p13762/domains/rams23.eu/public_html/administrator/components/com_vminvoice/libraries/tcpdf/tcpdf.php on line 8700

Warning: imagepng() [function.imagepng]: Unable to open '/home/p13762/domains/rams23.eu/public_html/tmp/VM_Facturen/mskp_901401932b4376a14ce7c911f8d3f043' for writing: No such file or directory in /home/p13762/domains/rams23.eu/public_html/administrator/components/com_vminvoice/libraries/tcpdf/tcpdf.php on line 8705

Warning: fopen(/home/p13762/domains/rams23.eu/public_html/tmp/VM_Facturen/mska_901401932b4376a14ce7c911f8d3f043) [function.fopen]: failed to open stream: No such file or directory in /home/p13762/domains/rams23.eu/public_html/administrator/components/com_vminvoice/libraries/tcpdf/tcpdf.php on line 8503
TCPDF ERROR: Can't open image file: /home/p13762/domains/rams23.eu/public_html/tmp/VM_Facturen/mska_901401932b4376a14ce7c911f8d3f043
</q>

Version 2.0.2.0 on J2.5.8 after update from 2.0.1.8 (updated because administration costs showed up after updating VM

It appears this is a common problem,
I purchased this only an hour ago and this has not even generated an invoice for me, I get the same problem straight away when clicking on email or pdf invoices.

Fatal error: func_get_args(): Can't be used as a function parameter in .../administrator/components/com_vminvoice/helpers/invoicehtmlparent.php on line 49

I removed the above offending line, to see what would happen and for both email and pdf invoices I then get the following:

Fatal error: Call to undefined method InvoiceHTML::sprintf() in .../administrator/components/com_vminvoice/helpers/invoicehtml.php on line 418

opening that file I find that the line is blank.

So ... without this this working this software is pretty much useless.
Right now I can not see how to use this to change the invoices info in the default VM orders info, that for a start would be a quick fix.

Hope you can help

I am running
Joomla! 2.5.8 Stable
Virtuemart 2.0.18a

Hello. We are sorry, it was bug in last version. We just released an update.

Thanks pama,
I upgraded using the option to go from Artio server and both email and pdf invoices are being generated.

FYI pama
I had seen on the Joomla site that you said due to constant updates VM2 updates there had been some problems but you had and update for VMinvoice. However it did not show the new updates available section, I check it just to be sure I had the latest version. Not sure if you changed anything within the time I posted here? just thought you might like to know.

So thanks again, I am up and running.

Thanks Pama! REally appreciate the update and now we can also create PDF's! Great!

May I suggest kindly that you keep us informed by writing to the posts when you are in the process of correcting the matter. Then people do not get frustrated not knowing that you are in the process of fixing the issue. Uncertainty is what get's people upset and that can easily be fixed with a brief info from the admin that the matter is being fixed. Just a kind suggestion!

Thanks again!

Greetings,
Anne

Yes, sorry, we have lot of mess here lately.
There was small bug in latest 2.0.21 release (see www.artio.net/support-forums/vm-invoice/...roblems-with-invoice). Please, go to component upgrade screen and click on "Reinstall" button if you experience it.