Hi Everybody:
I am a beginner. I am trying to combine parts of my models.
Can any one help me how to save & import model parts (.hip) i finished to my other hip file to merge them and to complete the medeling.
I guess i need to save it as .bgeo to import to other houdini file. if that is the case How can i save as bgeo format? thanks very much.

Have you tried from the main menu, File > Merge?

Are these parts in separate hip files?

If so, then
1) Open a 2 Houdini sessions, load one of your hip files into one session, then in the network editor select the object node you want to merge and press Ctrl + C (Copy)

2) Go to the other Houdini session and in the network editor press Ctrl + V (Paste) and you'll have that object in the session. Repeat for other files.

You can write out .bgeo with the ROP Geometry SOP node. Just use .bgeo in the file's extension.

Thank you very much again.
Arigato Gozaimassne !

By the way my ex-college roommate was from Kyoto. His name is Shinn.
He was a great cook specialized in Kyoza. I am getting hungry again.

edward
Have you tried from the main menu, File > Merge?

Thank you very much, again