Bosch Dishwasher trouble

The water is not draining from my Bosch dishwasher at the end of it’s cycle. We have taken it apart and checked the drain for clogs. We thought the problem might be the pump motor but when I took it into my local appliance store they told me it was still working and that that part could not be replaced anyway as it had been discontinued. I would like to know what else I can look for and I also need a manual that shows me how to put it back together. If I can’t get it working I wonder if it is worth calling in a professional or if we should get a new machine. We have not installed anything new that would affect it. Can you help?