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Just a short note to discuss a problem faced by me while applying CPU Jan patch to clusterware on AIX 5L. I was getting following errors UtilSession failed: ApplySession failed in system modification phase... 'ApplySession::apply failed: Copy failed from '/archive/oracle/soft/Patch/6980307/6756433/files/lib/libhasgen10.so' to '/oracle/crs_base/app/product/crs10gR2/lib/libhasgen10.so'... Copy failed from '/archive/oracle/soft/Patch/6980307/6756433/files/lib/libocr10.so' to '/oracle/crs_base/app/product/crs10gR2/lib/libocr10.so'... Copy failed from '/archive/oracle/soft/Patch/6980307/6756433/files/lib/libocrb10.so' to '/oracle/crs_base/app/product/crs10gR2/lib/libocrb10.so'... Copy failed from '/archive/oracle/soft/Patch/6980307/6756433/files/lib/libocrutl10.so' to '/oracle/crs_base/app/product/crs10gR2/lib/libocrutl10.so'.. I had followed all the  pre-requsites for this patch installation i.e 1)Stopped the database instance and ASM instance on the node 2)Stopped the nodeapps services 3)Stopped the clusterware 4) Executed /usr/sbin/slibclean as root I searched over metalink and found a note recommending renaming the files and  retrying the patching process. One more suggestion was to copy the files manually. I thought of debugging this issue (also wanted to have clean installation), so I checked for processes being run by ‘oracle’ … Read entire article »