JBase Vs Java

Some help is needed urgently
While using the following function CALL J in Jbase,Error 2 is
occuring, The error is that it couldn't load Java virtual Machine
(JVM).
What are the optmal configuration of the system variables for Java
Vitrual Machine.
Someone knows what is the solution to this type of errors?

Let me get this right. JBase is making a call to the operating system to
run a Java program? The fact that you're getting this basic error tells
me that there is something wrong with your PATH variable - either it's
undefined, there is no component for Java, or the Java component doesn't
point to a JVM.

What we really need is your JBase code with a detailed explanation of
what is supposed to be going on.