Upgrade to 4.2 Issue

Hi, I am using dolphin 7.3.5 and want to upgrade to v4.0.

I get the This upgrade cannot be applied error after uploading all of the files.

I have tried a few times and keep having to restore the site.

I have a lot of Modzzz mods installed and using php 5.6.

I tried changing to php7.2 but the issue wont go away.

I have read several posts but none lead to a solution. Is the upgraded possible? If so, what is the process regarding php etc.

PS: All files were replaced with th upgrade files fropm here: 

https://www.boonex.com/trac/dolphin/wiki/7.3.5-7.4.0

Any ideas how to get the upgrade done. Thanks

I am available for Dolphin upgrade services if needed.

Thanks Modzz but I want to try and fix this myself.

I will however still be getting back to you regarding the mod I want and that I mentioned before you began updating your pile of mods.

Much appreciated.

Hello hawk007!

The upgrade error message usually appears when something wrong with the upgrade folders - incompleted content or wrongly defined paths. Please PM me your admin access to the first-step checks.

Thanks LeonidS

I have PM'd you the details.

Thanks. Much appreciated.

Sorted it. It was because of thius:

5) Set "sys_tmp_version" config variable in "sys_options" table back to 7.3.4

Changed to 7.3.5 and the upograde procerssed.

Thanks for the support

Much appreciated