hi rohit, first of all thank you for your help!!! Ok...you are right both directories are there 1. /tmp/YaST2-0815/iso and 2. /tmp/YaST2-0815/iso_skeleton/skeleton but in /tmp/YaST2-0815/iso are clean directories ./boot/loader. The same directories are also in /tmp/YaST2-0815/iso_skeleton/skeleton and there you can find isolinux.cfg, isolinux.bin and so on. I noticed that and changed the upper path but with no result when i try to do it manually. There is always an segmentation fault. What has to be in /tmp/YaST2-0815/iso/boot/loader ? Is it the same like in /tmp/YaST2-0815/iso_skeleton/skeleton/boot loader ? Or are there special boot options generated when creating the iso? Greetings Marc So notice that the CD to be created - takes the following pathspec. 1. /tmp/Yast2-01251/two_directories on last two lines. iso and iso_skeleton 2. Other files for stats to be put on CD about publisher etc. Now you come to this... what is contained in those directories? mkisofs shall take all that is there. Is something there? Hi there, these are the last lines in the /var/log/Yast2/y2log while YaST2 pretends to make the iso file 2002-12-18 10:26:28 <1> linux(1251) [YCP] modules/AIServer.ycp(initIsoParams):181 Data dir: /suse 2002-12-18 10:26:28 <1> linux(1251) [agent-system] SystemAgent.cc(Execute):967 mkdir /tmp/YaST2-01251/iso 2002-12-18 10:26:30 <1> linux(1251) [YCP] modules/AIServer.ycp(AIServer::createISOCmd):220 found boot image. Making CD bootable. 2002-12-18 10:26:30 <1> linux(1251) [agent-system] SystemAgent.cc(Execute):967 mkdir /tmp/YaST2- 01251/iso/boot/loader 2002-12-18 10:26:30 <1> linux(1251) [YCP] autoinstall/packageMgmt.ycp(createISO):358 command: mkisofs -p "SuSE Linux AG" -V"SU8100.001" -P "SuSE Linux AG" -r -T -pad -no-emul-boot -boot-load-size 4 -boot-info-table -A "SuSE-Linux-Professional-INT-i386 Version 8.1" -sort /tmp/YaST2-01251/sortfile -b boot/loader/isolinux.bin -c boot.cat -o /suse.iso /tmp/YaST2-01251/iso /tmp/YaST2-01251/iso_skeleton/skeleton 2002-12-18 10:26:30 <1> linux(1251) [YCP] autoinstall/packageMgmt.ycp(createISO):362 size: 45858099 Any hints? Greetings marc