Hi there Ash,
The multisite that I built using the plugin as an invoicing machine started to play up today and throw an error when viewing the PDF or trying to email the PDF.
Here is the error in which I hope might shed some light on what I can do to resolve this. Of all days to happen. it is the day we are training the user how to create invoices.
Warning: fopen(/home/chome/public_html/wp-content/plugins/invoice-king-pro/includes/../../outputs/4.pdf): failed to open stream: No such file or directory in /home/chome/public_html/wp-content/plugins/invoice-king-pro/packages/fpdf/fpdf.php on line 1075
FPDF error: Unable to create output file: /home/chome/public_html/wp-content/plugins/invoice-king-pro/includes/../../outputs/4.pdf
Hopefully you might know what I can do get past this... I have read all the other posts here in the support forum, and have seen a suggestion to make the /includes folder writable. I had it at default 755, then changed it to 775, and then 777 (each not helping)