Hi @Abhay_G_Shirodkar
From looking at your picture it seems you have 2 sections of U220 at the top of the staircase, 1 of them is already mitred into the landing U220 and 1 of them isnt. If you do a selection window over the U220s above the splice connection i think you will find a clash between both of them
It would be easier to find out the issue if you could upload the model or part of the model.
Rob Merriman, AEC Technical Lead, Graitec
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