Pointools Export

I'm trying to export to a .PTS file, but when I export only a small number of points are exported?

There are 15 large scans attached, which I've reduced to a smaller area using the clip tools, with some points split into layers. When I export only 21kb or only a few points are exported?

Please can someone advised why this is happening?????

Note: i'm working with external drives using usb3 as the files need to be mobile, so I can process on various machines.

Thanks

Alex