Upgrade SQL Script from V2.0 to V2.1 unknow error

Hello,

Running the script unpgrade.sql from V.20 vs. V2.1

I've got the "An unknown error has occured. Please try again."

I download the script here nopCommerce 2.10 (upgrade script)  in the download section and I read all procedure for to upgrade it!!!!!

can Someone tell me what is the mistake?

Thank you very much

Hello,

nobody know what is it the problem in the script V2.1 upgrade.sql ?????

It make every time the error!!!

please help

Thank you!