Error when running test cases

Hi

I have a test case that contains 3 steps

If i execute the steps independently, this works fine and all the results are displayed

But... if i execute the test case and run the 3 steps, even having the right assertion, when clicking in transaction log and click in one of the tests, instead of data, i have in the outline tab an error: "org.apache.xmlbeans.xmlexception error unexpected end of file after null"

Any idea why this is happening? Is it because of any configuration?

Thanks