Upgrading OJS from 3.0.1 to 3.3.08

I am having trouble upgrading OJS from 3.0.1 to 3.2 or 3.3…
Database seems to be incompatible…
Are there any steps or help ?
Thanks in advance

Hi @mkopljar ,

You must follow the upgrade procedure: How to Upgrade

Regards, Primož

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It is not possible because DATABASES ARE NOT COMPATIBLE !!!
Even upgrading from 3.0.1 to 3.2 does not work
What should I upgrade to ? 3.1.4 ???

Hi Mario,

What do you mean with “databases are not compatible”?

Never heard about this problem before…
When in the upgrade process did you get this error?
Do you mind to publish the exact error and your logs?


Dabase structure is different between ojs 3.1.0 and
After upgrade, it dos not work. Roles are different, many tables have different structures. You can check yourself. Just compare databases created by ojs 3.1.0 and and compare the number of tables and structure of e.g. articles or submission tables…