I am closing this issue as it did not have any relevant updates since 2010. Please feel free to reopen it if you think it is still relevant.

Same issue. Strange seeing Windows be a better supported platform then OSX for this sort of tool.

I'm attempting to run hibernate tools inside of Eclipse... and it teased me with the dropdown to set "Executable To Run Graphvitz" option in the properties for Schema Documentation Export.

This has been a reported problem for nearly 3 years now: https://forum.hibernate.org/viewtopic.php?f=6&t=971908

The solution is very simple, Windows is the oddball, not Linux, Mac, Solaris and every other flavor of Unix out there. Change the escape method logic to IS_WINDOWS and only add the escape characters for that case.