Sometimes when running build we run into an error in the runLsHistory module.
I wish I could provide more info but cannot. At this moment, if we run into this problem we run the build again and it works.

14:08:58 [builder_RavenPlatMain_Chassis_Recommended] $ cleartool lshistory -all -since 15-oct-10.17:49:07utc+0000 -fmt '\"%Nd\" \"%u\" \"%En\" \"%Vn\" \"%e\" \"%o\" \"%[activity]p\" \n%c\n' -branch brtype:RavenPlatMain_Int -nco vobs/Raven3p vobs/ravenp/RavenPlat
14:08:58 "20101015.140408" "builder" "/ccstore/builder/hudson/workspace/RavenPlatMain_Chassis_Recommended/builder_RavenPlatMain_Chassis_Recommended/vobs/ravenp/RavenPlat/platform/chassis_image/component_baselines.txt" "/main/RavenPlatMain_Int/16" "create version" "checkin" "chassis-buildnum--int-RavenPlatMain"
14:08:58
14:08:58 "20101015.135015" "builder" "/ccstore/builder/hudson/workspace/RavenPlatMain_Chassis_Recommended/builder_RavenPlatMain_Chassis_Recommended/vobs/ravenp/RavenPlat/scripts/buildnumbers/chassis-buildnum" "/main/RavenPlat_mainline/RavenPlatMain_Int/645" "create version" "checkin" "chassis-buildnum--int-RavenPlatMain"
14:08:58 auto incrementing buildnumber to 184
14:08:58
14:08:58 FATAL: null
14:08:58 java.lang.NullPointerException
14:08:58 at hudson.plugins.clearcase.ucm.UcmHistoryAction.runLsHistory(UcmHistoryAction.java:175)
14:08:58 at hudson.plugins.clearcase.history.AbstractHistoryAction.getChanges(AbstractHistoryAction.java:80)
14:08:58 at hudson.plugins.clearcase.AbstractClearCaseScm.saveChangeLog(AbstractClearCaseScm.java:509)
14:08:58 at hudson.plugins.clearcase.AbstractClearCaseScm.checkout(AbstractClearCaseScm.java:484)
14:08:58 at hudson.model.AbstractProject.checkout(AbstractProject.java:1082)
14:08:58 at hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:479)
14:08:58 at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:411)
14:08:58 at hudson.model.Run.run(Run.java:1280)
14:08:58 at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
14:08:58 at hudson.model.ResourceController.execute(ResourceController.java:88)
14:08:58 at hudson.model.Executor.run(Executor.java:140)