Bug in the tree supports code

[LindsayPatten 1]

There appears to be a bug in the tree supports code. I run into the problem regularly but it seems somewhat random - sometimes reslicing even with the same settings fixes the problem.  The problem is that the diameter of the support sometimes changes between two layers, usually an increase I think.  In the example below the increase is small but large enough to cause the print to fail.  Usually I notice these and they are fixed if I slice again with some small change in settings.  In this case I changed a setting and then changed it back and the new slicing didn't have the problem.  In this case it was small enough that I didn't notice it until the print failed.

 

Because of the randomness it is hard to reproduce consistently so it will probably be difficult to fix.

[LindsayPatten 1]

Here's another example with a bigger discontinuous change in diameter.