Warnings and errors in console during test(org.xml.sax.ErrorHandler was not set / connection closed)

Hi,

when I run one-click tests, in console I get all the time errors and warnings, but test cases work properly:

Warning: validation was turned on but org.xml.sax.ErrorHandler was not set, which is probably not what is desired. Parser will use a default ErrorHandler to print the first 10 errors. Please call the 'setErrorHandler' method to fix this.
Error: URI=null Document is invalid: no grammar found.
Error URI=null Line 1 Document root element "s:Envelope", must match DOCTYPE root "null".

Everything would be great except 'freeze' SoapUI - so I can't do nothing with SoapUI after this error:

DEBUG [SoapUIMultiThreadedHttpConnectionManager$SoapUIDefaultClientConnection] Connection closed

Is any possibility to fix this? I do 1-2 hours one-click tests and sometimes I don't have results cause SoapUI just freeze.

Thanks in advance.