This time its really a very basic doubt. sorry about it (beginner) ops:
I want to upload a scene file on this forum, which has a .bgeo file in it. So I should also attach that .bgeo file along with .hip file. But I am not able to attach . bgeo file, getting message ‘.bgeo extension is not allowed’ & without that .bgeo file .hip file is not working. What do I do?

You can just zip/tar up all your files and upload the archive no problem.

If your .bego is just 1 file, (not a sequence of .bgeo files), then you can lock the File SOP node using the padlock button on the File SOP node (red button second from the left). This will allow the .bgeo to be saved inside the .hip file.

thanks graham & jenny So if its a sequence of .bgeo files, I have to zip up all the files..