安装Omnet ++，。/ configure和make后，我收到此错误：
JVM terminated. Exit code=13
/home/jayabalan/usr/omnetpp-4.6/ide/jre/bin/java
-Dosgi.requiredJavaVersion=1.7
-Xms256m
-Xmx1024m
-XX:MaxPermSize=320m
-Dosgi.instance.area.default=/home/jayabalan/usr/omnetpp-4.6/bin/../ide/../samples
-jar /home/jayabalan/usr/omnetpp-4.6/ide//plugins/org.eclipse.equinox.launcher_1.3.0.v20140415-2008.jar
-os linux
-ws gtk
-arch x86_64
-showsplash
-launcher /home/jayabalan/usr/omnetpp-4.6/ide/omnetpp
-name OMNeT++ IDE
--launcher.library /home/jayabalan/usr/omnetpp-4.6/ide//plugins/org.eclipse.equinox.launcher.gtk.linux.x86_64_1.1.200.v20140603-1326/eclipse_1605.so
-startup /home/jayabalan/usr/omnetpp-4.6/ide//plugins/org.eclipse.equinox.launcher_1.3.0.v20140415-2008.jar
--launcher.appendVmargs
-exitdata 340021
-vm /home/jayabalan/usr/omnetpp-4.6/ide/jre/bin/java
-vmargs
-Dosgi.requiredJavaVersion=1.7
-Xms256m
-Xmx1024m
-XX:MaxPermSize=320m
-Dosgi.instance.area.default=/home/jayabalan/usr/omnetpp-4.6/bin/../ide/../samples
-jar /home/jayabalan/usr/omnetpp-4.6/ide//plugins/org.eclipse.equinox.launcher_1.3.0.v20140415-2008.jar
我已经下载了jre 1.8版本，并将它放在Omnet ++目录中的ide文件夹中。请帮忙！