vm 2.0.26d to v2.6.10

[coxi]

Hi,
unable to turn on any option of the VM componant... 
As admin, I ask to turn on tools, debug mode in config but I can't save anything.
I tried to mod an item but I can't.
I tried to create a new one. Form is opened but you can't save your work...
In Maxthon browser, I have a 500 error (not in chrome neither mozilla). And blank page with empty code head/body.

[coxi]

Hum,
I apologize... I wa saying I migrate from 2.0.26d to 2.6.10 but in fact, it wa from 2.0.20d....
I decide to migrate step by step, from a stable version to an other one.
Right. It was short.
I migrate from 2.0.20d to 2.0.26d and... all became blank.
Not a problem of DB because I used a DB installed by VM 2.9.9d.
Problem come from CSS or PHP, or .ini or...

[GJC Web Design]

post 2 on this topic

Basically there is no "solution" until you find the error - all errors are logged somewhere.. once you find it you can proceed..
This has been answered multiple times on here (by me and others) of the steps u need to take to find your fatal error...

Not a problem of DB because I used a DB installed by VM 2.9.9d.

WHAT?  why would you think a 2.9.9 database will work on an ancient  2.0.x?

[Milbo]

You can directly update from any vm1.9.8 to vm latest, that means vm2.6.10 or vm2.9.9D atm

[coxi]

For my own, issue is solved.... 
At first, I upgraded step by step from 2.0.20d to 2.0.26d, then....
It worked up to 2.5.5.
Not after 2.6.0. except one hour later. Why ?
But cart didn't work. And this is a special cart -> VP One check. I went to VP website and see they released 2.4 version in 2014 august 2.0/2.6 compatible. So I think older version didn't work with 2.6 VM.

I purchased 2.4 VP One check and upgrade my website and now all work fine...
But I don't know if upgrade directly from 2.0.20d to 2.6.10 or higher will work fine...

Thanks for all answers.
Regards.
Alain.