Thanks for your quick reply Hanchuan.

Since I don't have previous experience with neuronal reconstructions and further analysis, I am just worried that SWC files that give the same reconstruction in Vaa3D but somehow differ in the text file (like the examples I posted), give different results when morphometric analysis are performed.

I also noticed that in the SWC files I get (see the 2 examples I posted) there are several nodes with parent column values = -1. I understand that this means that these nodes are not coming from any of the other nodes. I expected this for the startting node but not for other nodes. I checked your SWC test data and several SWC files from other labs that I found in Neuromorpho and I never observed this. Is it a problem?

Jesus.