Problem downloading invoices

[JDMoreno]

Hi all, i have a problem with invoices when i try to generate PDF clicking in the invoice button, appears a white screen without information, i have tried to enable the debug mode, set display errors on, check error logs and no info yet. I can't download the new order invoices but i can download some older.

I have some modules for invoices installed, and i tried to disable these modules and generate new orders, but still i get this error.

I have tried also cleaning cache, update all modules, and update core to latest version, with no results.

My prestashop version is 1.6.1.5

Please help, some recomendation?

Thanks, regards.

[JDMoreno]

Solved! finally i found the problem, the problem was in the database, i fixed it changing the ps_configuration start_invoice_number to the next number and deleting the invoices that cause errors, and then regenerate the invoice.

Regards.