One of my 2 bosch dishwashers won't drain. Water is standing in the bottom of the washer above the screen. I have swapped out the control panel from the other unit and am still having the same problem. When I run the test cycle It comes back as solid (not flashing) 0. Which is no faults detected. I have also checked the drain pump to make sure it is moving freely. It was stuck but now moves freely. Still having the same issue. I have checked the drain hose and have blown air back into the dishwasher. I was wondering if it could be a flow or float switch, but I thought the test cycle would catch this. When I remove the water with a cup out of the bottom of the washer there is 4 plus liters of standing water. Any ideas???

I now have the exact same problem. My dishwasher is installed without an Air Gap so I know that isn't the problem. Since I'm able to blow air back into the dishwasher, albeit with some resistance, is this still a clog?
I also filled the hose with clean water, turned on the pump and blew some of that water back into the line. Still nothing comes out.
I know that the propeller is turning based on indications in the tub once I open the door. What else might this be?
Removing the dishwasher is going to be nearly impossible due to a new floor put in after the dishwasher was installed. Joy.