sopc won't start, quartus ii 12.1, ubuntu 12.04

I figured it out. First to see what is wrong with sopc_builder try this:

$ sopc_builder --debug_log=sopc-log.txt

(you can use any log file name you choose, my guess is, they all offer some sort of command line debugging)

when I looked in the log, it said this:

libXtst.so.6: cannot open shared object file: No such file or directory

so I did this:

$ apt-get install ia32-libs

this installed the 32 version of libXtst.so.6, now it fires up

remember, this is all for ubuntu 12.04, not sure how this will work for other flavors

Happy designing...

Mike