launch signal tap thru command line

Hi,

I'm trying to open the siganl tap using the command line but fails.

I've found this link:

http://www.alteraforum.com/forum/showthread.php?t=40821

and tried using this command only:

open_session -name stp1.stp

I've put it in a tcl file and ran it in the command line using:

quartus_stp -t launch_stp.tcl

It does not work. When I run it, I get the following error, saying 'can't open signaltap II file for reading. Make sure the signaltap II file exists and has read permission".

Well, I checked, and the file do exists and has permission as any regular file. I've found this error documented here:

http://drlnet.dyndns.org/help/quartus/webhelp/mergedprojects/tafs/tafs/tcl_pkg_stp_ver_1.0_cmd_open_session.htm

But nothing special is said regarding that.

Any idea how to invoke the signal tap sw?

btw, I'm using version 10.1.

Thx.