SPlatten:
Command line:/opt/usr/bin/jamvm -Dgnu.classpath.boot.library.path=/opt/usr/lib/classpath -Xbootclasspath:/opt/usr/share/jamvm/classes.zip:/opt/usr/share/classpath/glibj.zip -jar DSgateway.jar
I don't have a manifest file.
That means that you didn't run your classes from a .jar file with your other Java implementation. Jamvm doesn't know which class in the .jar file to use for a starting point. You need to have a manifest entry in your .jar file as follows;
Main-Class: YourMainClass
kind regards,
Jos