Hi,
I noticed some issues when I tried to import in an other software the following models exported at Collada format:
They contain a few empty <p /> in some <lines> elements.
First, this shouldn’t happen since it leads to a empty lines, and I even wonder if it’s not a bug in the export procedure of Sketchup because the count attribute of these <lines> elements isn’t zero.
Hope you can fix it…
Emmanuel
The first example had 1 in 143, the second had 8 in 157. I downloaded the second one (it’s a SketchUp 8 model that hasn’t been re-rendered in a while), saved in 2015, exported to collada, and went went down to 2, and no
.
So I think you’re seeing this because these are models that were exported a while ago, and haven’t been re-rendered with newer versions of SketchUp. If it really bothers you or you see an error, do what I did: download the .skp, purge unused and fix errors, save in 2015, export to collada.
Thanks for your reply 
It would be nice to fix it in the DAE files generated by Sketchup, because I think it doesn’t respect the Collada specifications. If you look at the section about <lines> element at page 5-71, its count attribute indicates a number of lines and its <p> child element lists a number of indices at least equal to twice the value of the count attribute.
In the DAE files I cited, the count attribute wasn’t zero, reflecting probably an issue. Either some indices are missing in the <p> child element, or the count attribute of some lines elements is wrong.
The same problem. Wrong index count in p tag (line #1256 in .dae file)
chair.dae (114.5 KB)
Need to change name looks like table to me 
Mesh lab reports 770+ duplicate vertices. SU has never stated they are 100% compliant with the dae schema. I think at SU 8 it was about 93%