sles 9.0 and create_package_descr

Hello, I tried to create an installation source with some binary rpm packages (they are binary from the update). I use create_package_descr (I even tried with genIS_PLAINCACHE and with nothing too) and then add the local directory in YaST. When there is a lot of packages (>30) I see "no db path found" and when I try to install a package YaST (and yast cd-creator) segfaults. Thanks for your help, Pierre