adpreclone.pl - java.io.FileNotFoundException: /appsutil/clone/jlib/oui/jlib/Libraries.old

Error:

During staging of DB tier getting below error.

copying /u01/uat/db/tech_st/11.2.0.3/appsutil/clone//jlib/oui//jlib/Libraries.old
StackTrace:
java.io.FileNotFoundException: /u01/uat/db/tech_st/11.2.0.3/appsutil/clone/jlib/oui/jlib/Libraries.old (Is a directory)
        at java.io.FileInputStream.open(Native Method)
        at java.io.FileInputStream.<init>(FileInputStream.java:106)
        at oracle.apps.ad.util.FileCopy.copy(FileCopy.java:86)
        at oracle.apps.ad.util.FileCopy.copy(FileCopy.java:118)
        at oracle.apps.ad.clone.util.CreateCloningStage.getOUI(CreateCloningStage.java:446)
        at oracle.apps.ad.clone.util.CreateCloningStage.createJlib(CreateCloningStage.java:278)
        at oracle.apps.ad.clone.util.CreateCloningStage.createBaseArea(CreateCloningStage.java:193)
        at oracle.apps.ad.clone.util.CreateCloningStage.<init>(CreateCloningStage.java:143)
        at oracle.apps.ad.clone.util.CreateCloningStage.<init>(CreateCloningStage.java:108)
        at oracle.apps.ad.clone.util.CreateCloningStage.<init>(CreateCloningStage.java:93)
        at oracle.apps.ad.clone.StageDBTechStack.doStage(StageDBTechStack.java:280)
        at oracle.apps.ad.clone.StageDBTechStack.<init>(StageDBTechStack.java:267)
        at oracle.apps.ad.clone.StageDBTier.<init>(StageDBTier.java:151)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:501)
        at oracle.apps.ad.clone.util.CloneProcessor.run(CloneProcessor.java:67)
        at java.lang.Thread.run(Thread.java:637)


Solution:
cd $ORACLE_HOME/oui/jlib
rm Libraries.old
rm jlib

Then rerun 

perl adpreclone.pl dbTier