When configuring a job to build from a specific baseline on a stream with no post job baselining, the build runs OK.
When configuring a job to build from LATEST version of a branch, with post job baselining, the build runs OK, and never mind if the baseline is a full one or not.

When configuring a job to build from a specific baseline on a stream along with a post job baselining operation, the build fails just when starting with the following message :

Started by user hudson_admin
Building on master
FATAL: com.michelin.cio.hudson.plugins.clearcaseucmbaseline.ClearCaseUcmBaselineSCM
java.lang.ClassCastException: com.michelin.cio.hudson.plugins.clearcaseucmbaseline.ClearCaseUcmBaselineSCM
at hudson.plugins.clearcase.ucm.UcmMakeBaseline.prebuild(UcmMakeBaseline.java:216)
at hudson.model.AbstractBuild$AbstractRunner.preBuild(AbstractBuild.java:595)
at hudson.model.AbstractBuild$AbstractRunner.preBuild(AbstractBuild.java:590)
at hudson.model.AbstractBuild$AbstractRunner.preBuild(AbstractBuild.java:586)
at hudson.model.Build$RunnerImpl.doRun(Build.java:114)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:416)
at hudson.model.Run.run(Run.java:1224)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:122)