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If you used the specific "PointCloud files" suffix .igs then the points should NOT be 3D sketchpoints. It sounds like you might have used the standard .igs import instead.
To import them as cloud points, you need to drop down to the specific "PointCloud Files" file type. then load your file.
When I had a similar issue in Pro-E, the summary below solved the problem for Pro-E
. Export file as IGES, and select 'Datum Curves and points'
. Rename file from *.IGES to *.pts
. Open Offset CSys Datum Points tool, and click 'import' and select the *.pts file
I have been able to import points from an Excel file by saving the Excel file as a *.txt file, and then use the cloud point tool (Scanto3D) to import the *.txt file. I have not been able to get SolidWorks to import an IGES file that also contains both points and surfaces or solids. Pro-E can import an IGES containing 3-D points, curves, solids, and surfaces. I do not see any options in SolidWorks to change the IGES import settings. Perhaps this could be an enhancement request?
There is a macro that will supposedly will perform a Point Import From Excel on this link without the Scanto3D add-in.
If I had this IGES file, I would try stripping the points from the file in Pro-E by saving (exporting) the points (from Pro-E's Offset CSys Datum Points tool) as a *.pts file. Excel can open a *.pts file and convert to a *.txt file and this file can be then imported into SolidWorks using the cloud point tool. 180K points could be a problem even for Excel. Perhaps grouping and saving the points in multiple files would make it more manageable.
If you find a more direct method, please let us know.
Hi Mark, thanks for your response.. I missed that option, it works fine now!