Joomla 2.5 to 3.4 upgrade problem

Hello,

I have a problem after upgrading from Joomla 2.5 to 3.4, after upgradig i get blank page with the error

"Fatal error: Class 'JParameter' not found in /home/site/public_html/plugins/system/plg_gkextmenu/plg_gkextmenu.php on line 26"

Is there a way to solve this? im using Storebox

Thank you

Hi
1) Disable then uninstall this plugin.
2) Install plugin for J3.x from:
gk_steakhouse_rest_files_J!3.zip
or
gk_storebox_rest_files_J!3.zip package

UNZIP ZIP Before !!

Hello,

Thank you but i cant even access to the backend, it shows me the same error

Regards!

so use old school method.... FTP and remove whole folder plugins/system/plg_gkextmenu

haha thank you! i have moved backwards using my backed up files and gone back to joomla 2.5, i have just upgraded everything now again, the only thing i have left is to upgrade to joomla 3.4, what are your recommendatios for this upgrade with the template so i dont get this error again?, can i install joomla 3.4 version template and then upgrade?

Thank you

In general you should first disable all GK plugins, update template , then update Joomla, then update (reinstall) all plugins and modules - from J3.x package

Thank you!

I have now upgraded succesfully, the only problem now is that when i get into any menu item (virtuemart store sidebar menu) the sidebar menu goes down to the footer, do you have any idea on what this can be for?

you can follow this URL to see the error http://www.ananay.cl/tienda

Can this be a template error?

Thank you!

Weird... I have to check on my quickstart. ok, checked, and looks okey.

Did you updated template files also? layout/default.php , hmm and others?
Result code on front-end should be like this

code.png

And Yours is not

Hello thanks for the reply, yes I have updated the template to the Joomla 3.x version but this was before upgrading to Joomla 3.4, maybe that is the problem I will install the template again now directly in Joomla 3.4 to see what happens and I'll be back to you

Regards

Hello,

same problem happens upgrading the template, i have seen that others have similar problem in this topic

https://www.gavick.com/forums/storebox-joomla3/virtuemart-subcategories-sidebar-error-44079?p=229875&hilit=storebox#p229875

Can this be the same problem im having?

Thanks!

I have no idea, but just replace this file which I told before you (using FTP) from new template package and check.

Thank you!

I have replaced the file but still doesnt work, now the sub categories work fine but the main categories still have the same error

Regards!

Try with CSS files (replace from new package)... on my quickstart based on current template version all looked okey, articles and VM dummy products.

Hello

Still cant solve this problem, is there anything else i can do ?

Regards!

Hard to say,
because we are not helping in Joomla/Components migrations or customizations.
Maybe on subdomain install GK Quickstart with J3.4 on board and check if all works and looks okey,
this may help to identify your problem.