Adam Bien's Weblog
If You Get IOException: Unknown repository format "null"; expected "0" In NetBeans + Git
If NetBeans (7+) is not able to find the following entry in .git/config:
it throws an IOException with the message:
[core] repositoryformatversion = 0
"Unknown repository format "null"; expected "0".
To solve the problem open .git/config and add the entry above or execute:
git config --add core.repositoryformatversion 0 from command line.
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