Problems with failed web update

[rcheesley]

With a simple forum search for your error message I found this thread with a solution:

Strange Issue with Upgrading from 3.2.4 to 4.1.0

I have now tried a few more tricks and nothing worked. I tried to delete all the contacts to see if it was something with the length of an email address or name. This did not work I tried to install 4.1.0 by itself and then import the old database - obviously this did not work either. Tried to upgrade to 3.3.4 first and then 4.1 - still did not work. I removed the two plugins that I have installed here: Multidomain and RSS feed - still did not work

Perhaps you could try that?