I have this from the online doc :
In Cgo, Ascii free and IGES formats, you can not process more than 10,000 points at each import,
in one or several files, e.g. you can not import 4 files of 3,000 points each in one shot but you can import them separately.
This limitation applies to the input files (before Sampling or resizing with the bounding box).
If you try to import over 10,000 points in one shot, a fatal error panel is displayed:
Too many points for this configuration.
If the Grouped option is active, no file is imported.
If the Grouped option is not active, files are imported as long as the sum of their points does
not exceed 10,000 points.
Mesh Regeneration is not available on those files.
Eric N.
indocti discant et ament meminisse periti