We have experienced bugs in the user interface of Datacap Studio 8.1, particularly on the Test tab.
First, the Test tab displays the content of the Rulemanager tab. Second, it displays NOTHING. Yes, just nothing. Just white background without anything on it.
We just reinstalled Datacap and everything went fine as it should be. Restarting the machine does not solve it. If anyone knows an alternative solution, feel free to comment! 🙂