The trial between the city of Linz and Bawag PSK concerning the swap 4175 is still ongoing.
On June 30, 2014, the city filed a claim (the full text (in German) here) in which the judge was claimed to be biased. A senate (consisting of three judges) of the commercial court in Vienna had to decide if to allow this appeal or to dismiss it.
On Sept. 12, the appeal was dimissed (in German here ). The senate found no evidence that the judge would be biased.
The city of Linz will not appeal against this decision.
Therefore, the next step will be to decide if Uwe Wystup, who was named as one of two expert witnesses, is biased.