There seem to be some inconsistencies in the kbs-CentOS repository: [root at tabb1 ~]# yum update Setting up Update Process Setting up Repos kbs-CentOS-Extras 100% |=========================| 951 B 00:00 kbs-CentOS-Misc 100% |=========================| 951 B 00:00 update 100% |=========================| 951 B 00:00 base 100% |=========================| 1.1 kB 00:00 centosplus 100% |=========================| 951 B 00:00 addons 100% |=========================| 951 B 00:00 extras 100% |=========================| 1.1 kB 00:00 Reading repository metadata in from local files kbs-CentOS: ################################################## 1402/1402 kbs-CentOS: ################################################## 60/60 update : ################################################## 116/116 base : ################################################## 1406/1406 centosplus: ################################################## 81/81 extras : ################################################## 32/32 Resolving Dependencies --> Populating transaction set with selected packages. Please wait. ---> Package libcddb.i386 0:1.2.0-3.el4.kb set to be updated ---> Package ginac.i386 0:1.3.2-1.el4.kb set to be updated --> Running transaction check --> Processing Dependency: libcdio.so.5 for package: libcddb --> Processing Dependency: libginac-1.3.so.0 for package: octave-forge --> Processing Dependency: libcdio.so.5(CDIO_5) for package: libcddb --> Finished Dependency Resolution Error: Missing Dependency: libcdio.so.5 is needed by package libcddb Error: Missing Dependency: libginac-1.3.so.0 is needed by package octave-forge Error: Missing Dependency: libcdio.so.5(CDIO_5) is needed by package libcddb [root at tabb1 ~]# rpm -q libcddb ginac libcdio octave-forge libcddb-0.9.4-2 package ginac is not installed libcdio-0.75-3.el4.kb octave-forge-2004.11.16-8.el4.kb [root at tabb1 ~]# rpm -q GiNaC GiNaC-1.3.1-6.el4.kb Would be glad to supply any additional information required to debug. Any help appreciated. [Given recent discussions, should mention that I have used Dag, Dries, and ATrpms EL4 (but not FCx) repos but they don't SEEM to be factors here.] Thanks, Phil