how to catch failed chamfers

[sterlingcrispin]

I'm having chamfers fail quite often, I thought the returnvalue would be a good way to catch for this but when this line of code fails it doesn't return true or false it just hard fails and stops the program

chamfers.add(chamferInput)

 from the below 

            # Create the sweep.
            sweep = sweeps.add(sweepInput)
            
            #prepare chamfer
            faces = sweep.faces
            edges = adsk.core.ObjectCollection.create()

            for f in range(faces.count):
                for e in range(faces.item(f).edges.count):
                    edges.add(faces.item(f).edges.item(e))
                
            chamfers = rootComp.features.chamferFeatures
                    
            chamferInput = chamfers.createInput(edges,False)
            radiusMult = 0.5
            returnvalue = False
            while returnvalue is False and radiusMult > 0.1:
                returnvalue = chamferInput.setToEqualDistance(adsk.core.ValueInput.createByReal(radius*radiusMult))
                radiusMult *= 0.9
            if returnvalue is True:
                returnvalue = chamfers.add(chamferInput)
                if returnvalue is True:
                    chamfer = chamfers.add(chamferInput)

Is there another approach that would cause the program to continue and just not chamfer that Sweep object if it will fail?

[JeromeBriot]

Use a try-except statment:

app = adsk.core.Application.get()
ui = app.userInterface

try:

    chamfers.add(chamferInput)

except:

    if ui:
        ui.messageBox('Failed:\n{}'.format(traceback.format_exc()))