TOPIC: I want migrate 3.26 to 4.0b

how to save all comments?

Make a database dump.
Check your settings-> complete uninstall should be set to no.

Go uninstall, then install beta1 and your commetn should be still there working.

After installing 4.0 and before putting your site online again, be sure to triple-check all the parameter settings in the JoComment backend. Even if you didn't change anything, it's important to re-Save.

i had done a migration 3.26 ro 4.0b.
Db is completes but in the administration of Manage Comment there is this error:
Warning: call_user_func(JOSC_ubbcode::convertlinebreaks) [function.call-user-func]: Unable to call JOSC_ubbcode::convertlinebreaks(xxxx) in /htdocs/components/com_comment/classes/ubbcode/stringparser.class.php on line 381

Can you help me??

Thanks a lot

I have a very similar warning, which appears in the frontend as well at

www.schwarz-anwaelte.de/index.php?option...eladvocat&Itemid=123

In my case it is no upgrade but a fresh install.

The warning only appears to occur in case of a comment, not when posting a topic.

Ask your host to upgrade to php 5.2