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I've created an ssh cert using git gui, and I decided against using a passphrase. Git GUI, and the git command line client allow me to do this. However netbeans will not allow me to clone a repository when there is no passphrase. Once I set up a cert with a passphrase, everything works normally.
Attach the messages.log with the error.
i just tried with 7.2.1 on windows and it works. I enter the URL, username, path to the private key file, leave passphrase empty, select "Save passphrase" checkbox, click on Next and i get no error.