How to export multiple laser scans into one E57 file?

[depeurvince]

Hi,

I imported 291 laser scan from one e57 file, I did some transformations like cleaning points and georeferencing using markers but then I'm unable to export all the 291 scan in one E57 file, someone has an idea?

I also have trouble to select and delete some points, I don't understand why.

Thank you for your help!

Regards,
Vincent