I've just solved this problem.
In OpenMHP folder ./static there's file named openmhp.properties. You must write path to your OpenMHP instalation folder after equals in "additional_classpath=" line.
How to use Open-Mhp, I am trying to run a sample xLet but getting the following error in GUI as well as Command Line.
java.io.IOException: CreateProcess: java -Djava.security.manager "-Djava.securit
y.policy=D:\MHP Resources\Mhp-Application-Development (X-Let Related)\Tools & Si
mulators\openmhp104_bin\policy\0.0.policy" -classpath ".;.;D:\MHP Resources\MHP
MHP Resources\Mhp-Application-Development (X-Let Related)\Tools & Simulators\xle
tview-0.3.6\JMF2.1.1\lib\jmf.jar;D:\MHP Resources\Mhp-Application-Development (X
-Let Related)\Tools & Simulators\openmhp104_bin" org.openmhp.system.RunXlet . in
.cdac.interactivetvservices.examples.awt.BlankXlet 0 0 . error=267
Thank in Advance,