The SKU code is intermittently not showing in the pdf. It doesn't seem to follow any pattern - happening on roughly every 10-15% of invoices produced. The sku's are assigned to every product and are well formed (no spaces, etc), so I can't figure it out.
Any help would be greatly appreciated.

Hello. We noticed this can sometimes happen when column content is somehow wider than column width. This seems the weaknes of TCPDF library (we're also experimenting with some other libraries now). We suggest make SKU column wider in invoice template. (At "Items header", edit HTML code and add some % to SKU column. Also remember to swich back to WYSIWYG view before save, Joomla sometimes doesn't save that with TinyMCE.)

I've increased the size of the column (and adjusted the others) in the config, but it's not helped.
I don't think it's to do with the column size as it misses off shorter SKUs also .... ?? it does seem strange and doesn't seem to follow any pattern

When you switch off PDF caching and try to create PDF again, problem persists? You can send us login to your site (to Diese E-Mail-Adresse ist gegen Spambots geschützt! Du musst JavaScript aktivieren, damit Du sie sehen kannst. ) and we will check the problem.

We have the same problem - it seems that longer SKUs are not printed on the invoice. We've increased column width for SKU but that didn't have any effect. Have you found the solution for this problem?

It was the item table that needed extending (I made it 15%) for me. I tested it by shortening the SKU on one of the invoices ... it then showed on the pdf, so I'm concluding it is related to the SKU/cell size?