notice the location of "opatch lsinventory" changed in 10.2.0.2
Log file location : /software/oracle/product/10.2.0/cfgtoollogs/opatch/opatch-2007_Sep_14_09-54-43-SGT_Fri.log
Lsinventory Output file location : /software/oracle/product/10.2.0/cfgtoollogs/opatch/lsinv/lsinventory-2007_Sep_14_09-54-43-SGT_Fri.txt