Hi Didier,
I am getting exactly the same problem. I downloaded the latest of your cloud plugin, tried it with both example.dat and a file with three lines written with vi (to ensure it was pure ascii) that had numbers such as
2,3,5
4,6,2
1,2,3
I also tried having a decimal after the numbers
2.01,3.03,5.01, etc...
and having a space for separator.
I am using metric, so the decimal should not be an issue.
I wonder if it is a problem with SketchUp 7 on a mac? I have tried three different versions of cloud, all with different files including example.dat. Always get the same error.
That is too bad because I was so happy when I found your plug in, it is exactly what I need to add some actual data to my galaxy.
Thank you,
Annie