Xiangbiao

You can select “Diagnostic Infomation” from View menu of hkey.
Please post the Diagnostic Information here,
so perhaps someone can help you.
What kind of video card are you using?

Quote from another thread in this forum:
a. Type ‘ping localhost’ in the shell. You should get something like “Pinging localhost ( 127.0.0.1 )”

b. If you do, please type ‘setenv SESI_LMHOST=localhost’ in the shell.

c. Now, we'll restart Hserver by typing ‘hserver -q’ then ‘hserver’.

To make sure Hserver is properly set, type ‘hserver -S localhost’.

You should get ‘License server changed to localhost’.

d. Next, we'll start the license server. Please type ‘/usr/lib/sesi/sesinetd.startup start’ in the shell.

If the license server started without any errors, please start Houdini.

I have a problem is similar to you.

Good luck.

Thank you, Stremik.
In the Dialogs > Edit
Aliases/Variables… dialog,
I create a new system variable called HOUDINI_COPTOPMAT and give it a value of 1.
Then close the dialog window, but can't see COP, TOP and MAT.
Why?

I'm a beginner to Houdini.
I am very glad my answer is helpful to you.
Very glad to learn Houdini along with you.