problem with PDC not finding resources

[cnbmcmlxix]

Hello,
on some papers submitted by our students, PDC v1731, when doing an internet check, is not finding any resources.
Is there any solution?
Thank you.

[Alexei B.]

Please contact us via our support e-mail, providing the report that you get. We will look into it.

I'm sorry for the delayed reply.

[cnbmcmlxix]

Thank you. I will contact you via email.
Have a nice day.