pilou2:
What you want to do is a database only update, dropping old Zencart but keeping the database. This is the best way to get a clean install for an update from a very old version of ZC.
The way you want to do it should work if you create the configure.php correctly.
Here is another flow, close but a little bit different that works each time:
- First do a clean install of ZC v2.1.0 by creating a new folder (eventually a virtual host too), then create its new database. Copy all files from ZC v2.1.0 release to your new folder.
Proceed with the install script until the end. The credential you use/create for admin here are not important but the database ones are.
- Now and only now, use phpMyAdmin to delete all tables in the database and import you old database.
- Run the install script again and you should have the update option. The admin credentials to be used here are the ones from your old site.
You will still need to copy some files from your old ZC, like products images, Defines pages...
The solution listed here is what I finely got to work by accident. Since nothing seemed to work I was in the data base via phpMyadmin seeing if I could convert my old data to show up in the new 2.1.0 and when I uploaded a file I got an Zantax error I tried the install one more time and there was the coveted UPDATE BUTTON and so I un-installed the whole database and put my old database file from1.5.5e and I hit the upgrade button and it loaded in about two minutes, and there was all my data.
I'm sure this will happen to others and I hope this helps.