Upgrade 2.3.7 to 2.4.8

When i upgrade one error comes there
A database error has occurred: Table ‘nujetorg_ojs.notification_subscription_settings’ doesn’t exist

Kindly provide solution for this

Hi @Jigna,

Are you using the command-line update tool or the web-based one? If possible, can you try the command-line upgrade tool and post the full output?

Regards,
Alec Smecher
Public Knowledge Project Team

Dear Alec

Thanks for your kind reply.
I don’t know the exact procedure to use command line upgrade tool. Kindly guide me.

Dear Alec

Thanks for your kind reply.
I don’t know the exact procedure to use command line upgrade tool. Kindly
guide me.

You can find this in the “Upgrading the OJS Database” section of the UPGRADE documentation:

Dear Sir

I have upgrade 2.4.8 successfully but now the problem is that I, can’t view PDF viewer or can’t download pdf file.

Hi @Jigna,

Please don’t double-post; it clutters the forum. Someone will follow up on your other post:
http://forum.pkp.sfu.ca/t/cant-download-or-view-pdf-files

Regards,
Alec Smecher
Public Knowledge Project Team