Build error : unable to locate Java runtime

It turned out to be a file permission problem, the error message was simply misleading. Actually java.exe could be located but was not executable under cygwin. Only the admin and user groups had any permissions for this directory. My own user account had to be added to the list of groups or users to make it work, although I am a member of the users and administrators groups. Obviously the default cygwin install cannot handle ACLs properly. Are there any notes about this in the documentation? I would also expect the setup to enforce any required file permissions.