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The error message does not seem related with SDC, but seem like the same pin is assigned to 2 location or fitter trying to merge two channel into same location.
Do you have any special setting in the qsf?
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I am pretty sure that my assignments are correct. I have assigned the positive nodes and the software automatically assigns the negative nodes to the correct pins. I recently talked shortly to a friend and he also made me think that it might be something with how I declare the IP-cores in the .qsf. I have not done anything in the file at all, and the way that I have declared the IP-cores is like components and then "port map", is that wrong?
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