Hi Mohammad, I did some testing in WaterCAD integrated with AutoCAD 2018. The snap is working fine for midpoint, nearest, perpendicular, intersection etc. You can try the following options; 1. In snap settings of AutoCAD check on all snap settings (Under Object Snap Tab > Select All) 2. In the same Tab ensure that the "Object Snap On" and "Object Snap Tracking On" options are checked. 3. Under the "Snap and Grid" tab, reduce the "Snap X spacing". The "Snap Y spacing" will automatically take the same value if "Equal X & Y spacing is checked on" Hope this helps.
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