Strange gap generated

[LIngenthron 0]

I've got a custom model with 6 columns.  Five of those columns slice perfectly.  The sixth, however, slices with a big random gap in the bottom (that doesn't exist in the model) that ruins the print (see image).  I can't for the life of me figure out why.  I've never had this issue with custom models in the past.

 

Any thoughts?  I've included the model in question.  It should be printed 1000x scale, base down, columns pointing up.

 

base-0.obj

[GregValiant 1,409]

That is often caused by errors in the model.  If you zoom in to your image you can see that there are a couple layers missing below the large gap.  In addition, Cura has determined that the area requires Top and Bottom layers which is telling us that it is calculating the lower and upper as separate parts and with a little sliver in between.

Here is the message from MS 3D Builder:

 

Here is the repaired model sliced.

 

Here is where that leg attaches (allegedly) to the frame.  I think the little step there is an indication of what the problem is.

 

Here is the repaired model.

 

 

Pbase-0.zip