I've never had that problem so it's probably not a bug.
Also, did you notice that it told you to enable debugging in setup? If you do that and try to Build Changed again, you'll get an error message with more details. If you post the details here you're also more likely to get help.
Another tip: be sure to turn debugging off after you're done with it or your log files will fill up with the detailed error messages.
Also, did you notice that it told you to enable debugging in setup? If you do that and try to Build Changed again, you'll get an error message with more details. If you post the details here you're also more likely to get help.
Another tip: be sure to turn debugging off after you're done with it or your log files will fill up with the detailed error messages.