Getting Error in starting - App node in recently stalled - BW 6.7, hotfix 5., TEA - 2.4

[Akash Kumar 4]

Error is ;

C:BW6_tibcobw6.7domainsTestappnodesTest_AppSpaceNew_AppNodebin>"C:BW6_tibcobw6.7domainsTestappnodesTest_AppSpaceNew_AppNodebinbwappnode-New_AppNode.exe" --propFile "C:BW6_tibcobw6.7domainsTestappnodesTest_AppSpaceNew_AppNodebinbwappnode-New_AppNode.tra" -config "C:BW6_tibcobw6.7domainsTestappnodesTest_AppSpaceNew_AppNodeconfig.ini" -l admin start

Failed to find the start class, "com/tibco/bw/thor/admin/node/Main" - bad classpath?

Exception in thread "main" java.lang.NoClassDefFoundError: ch/qos/logback/classic/joran/JoranConfigurator

Caused by: java.lang.ClassNotFoundException: ch.qos.logback.classic.joran.JoranConfigurator

    at java.net.URLClassLoader.findClass(URLClassLoader.java:382)

    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)

    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

Unable to find the start class

[Akash Kumar 4]

Any help on this, would be appreciated?