Trouble with Sweeping

 From:  Heiner (BILDERMENSCH)
5789.4 
Hi there,

@ Marco: I seems as if a cornerpoint is really the problem.
In fact, at the gap there is a corner point ...
How do i change a corner point into a curve?
Or do i have to reconstruct the curve ...

However, i attached the file if someone want to check,

regards
Heiner
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