Update target button is disabled after schema comparison

Question

I have created database project using VS 2012. Once the schema comparison is done, the update target button should be enabled to sync with target.

But it\'s not get

Answer 1

the everytime you open the "options" on "schema comparison" you must click on "compare" button again to activate the "update" button. However if it doesn't work at the first time, just close and reopen the Schema comparison file again.