hi i cant get my part to boundary surface along the edges can anyone help me
Instead of using boundary surface, I used Filled Surface and used your curve (sketch25) as a constraint curve:
Edit: I forgot to mention that I also made the bottom line of this sketch into construction geometry:
This will work with a Boundry surface, you just need to use the SelectionManager to select the OpenLoops rather than the whole sketch. It also thickens & merges OK.
Dan and Kevin have good suggestion - or a quick fix is to edit the sketch 26 and make it a closed profile - see att. file - then you can use boundary to build your model
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