Illegal string offset 'next_invoice_number'

Hello Mindan,
Are you using WPML? There is an issue with WPML at the moment, that wipes all the settings from this plugin (can you check this?).
If so, please add your voice to this thread, as it will speed the development of a solution:
https://wpml.org/forums/topic/settings-in-woocommerce-pdf-invoices-plugin-get-reset-to-default-values/

If you’re not using WPML, something else is wrong, definitely do let me know then!

Ewout

Hi Ewout

I’m indeed using WPML and my settings are wiped… Hadn’t noticed that (the website is fortunately under construction atm).

Does this explain the error ? Users explaining their settings issue in the other thread don’t seem to report any warning messages.

I’ll add my voice to the other thread anyway.

They haven’t mentioned the warning messages, but I know other WPML users have the same warnings. It depends on whether they have enabled WP_DEBUG too.

The warning stems from the fact that ALL settings are wiped, and thus the plugin cannot find the next_invoice_number. Normally this is automatically created, but when the settings get wiped all the time, it’s not there anymore.

Thanks for reporting! I hope we’ll have a solution for this issue soon!

I hope too, thanks for the lightning fast answer, much appreciated !

Got the exact same issue. I am using WPML too.
I hope this can be fixed asap.

Thank you Ewout.

Thanks for reporting! I’ll do anything within my powers to get this bug squashed as quickly as possible. Unfortunately my hands are tied at the moment, as I have to wait until the WPML team comes back with more information. Until it’s fixed, I am afraid the best thing to do is to temporarily disable the PDF invoice plugin or at least disable automatic attachment, in order to prevent orders from being blocked.

I’ll update this thread as soon as I have more information. I am very sorry for the inconvenience!

Ewout

Hi all,
I have just pushed an update (1.5.22) which should fix the issue.

WPML filters the settings but returned the wrong data and that broke the settings. I have now added a workaround that fixes this, hopefully WPML fixes this internally soon too…

Let me know if you have any other questions!

Ewout

Hi Ewout,

thanks for your effort.

I am using WPML, too and I just updated to 1.5.22, but it seems the problem is still available. After activating the plugin I get the message

Warning: Illegal string offset 'next_invoice_number' in ./wp-content/plugins/woocommerce-pdf-invoices-packing-slips/includes/class-wcpdf-settings.php on line 695

Thanks for your help!

I’m sorry, I forgot to say that you need to resave the template settings first, as they have been reset by WPML. After that it should work properly again, but do let me know if you continue to have this issue.

Thanks! Works like a charm again!

What template setting needs to be resaved? How can I do this?

Go to the PDF Invoice settings, then the Template tab and click “Save changes”. Done ??

I get some warnings after “Save Changes”, but then the plugin works again ??
thank you very much, Ewout!