While trying to compile custom HTML Email templates using ANT tool(ant compile) through Command Line interface we may experience below error.

C:\tibco\mdm\9.1\bin\buildTool\bin>ant compile
Buildfile: C:\tibco\mdm\9.1\bin\buildTool\bin\build.xml

init:

compileVeloselDependent:
     [echo] Compiling velosel dependent classes
    [javac] C:\tibco\mdm\9.1\bin\buildTool\bin\build.xml:198: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds
     [echo] Finished Compiling velosel dependent classes

compileCustomClasses:
     [echo] Compiling Non Velosel Dependent Custom classes
    [javac] C:\tibco\mdm\9.1\bin\buildTool\bin\build.xml:178: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds
     [echo] Finished Compiling velosel dependent classes

compileHtml:
  Using XMLC to compile 2 HTML files

BUILD FAILED
C:\tibco\mdm\9.1\bin\buildTool\bin\build.xml:225: java.lang.NoClassDefFoundError: org/enhydra/xml/xmlc/commands/xmlc/XMLC
        at com.martquest.anttask.HTMLCompiler.execute(HTMLCompiler.java:411)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
        at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
        at org.apache.tools.ant.Task.perform(Task.java:348)
        at org.apache.tools.ant.Target.execute(Target.java:390)
        at org.apache.tools.ant.Target.performTasks(Target.java:411)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399)
        at org.apache.tools.ant.Project.executeTarget(Project.java:1368)
        at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
        at org.apache.tools.ant.Main.runBuild(Main.java:809)
        at org.apache.tools.ant.Main.startAnt(Main.java:217)
        at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
        at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)
Caused by: java.lang.ClassNotFoundException: org.enhydra.xml.xmlc.commands.xmlc.XMLC