I am using Pega 7.1.5 to run BIX extract from command line. However it failed with below errors. Please help out on this issue;

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C:\Desktop\BIX>java -version
java version "1.6.0_06"
Java(TM) SE Runtime Environment (build 1.6.0_06-b02)
Java HotSpot(TM) Client VM (build 10.0-b22, mixed mode)

C:\Desktop\BIX>java -Xms512m -Xmx768m -classpath ".;C:\Users\530
413731\Desktop\BIX\lib\prbootstrap.jar; C:\Users\530413731\Desktop\BIX\lib\prdbc
p.jar; F:\DB2\new_drivers\db2jcc4.jar; C:\Users\530413731\Desktop\BIX\lib\jsr94-
1.0.jar;%CLASSPATH%" -Dcom.pega.pegarules.bootstrap.properties.url=config\prboot
strap.properties -Dpegarules.config=config\prconfig.xml -Dpegarules.logging.conf
iguration=config\prlogging.xml -Dcom.pega.pegarules.bootstrap.ignorejndi=true co
m.pega.pegarules.pub.PegaRULES com.pega.pegarules.data.internal.access.ExtractIm
pl -i CaseHistoryExtract
Exception in thread "main" java.lang.NoClassDefFoundError: ûXms512m
Caused by: java.lang.ClassNotFoundException: ûXms512m
        at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)

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