SAX and JNI

Question

I'm having problems using Java classes from C. I've managed to trace the problem as far as the SAX parser, but I have no idea why there's a problem at all.
With the -verbose:jni option on, there's a message: "Unable to read from file" and then the JVM stops (crashes actually.)
I create a VM as follows:
        JavaVM* jvm;
     JNIEnv* env;
     JavaVMInitArgs args;
     JavaVMOption options[3];
     int ret;
     args.version = JNI_VERSION_1_4;
     args.nOptions = 3;
     options[0].optionString = classPath;
     options[1].optionString = "-verbose:jni";
     options[2].optionString = "-Djavax.xml.transform.TransformerFactory=net.sf.saxon.TransformerFactoryImpl";
     args.options = options;
     args.ignoreUnrecognized = JNI_TRUE;
     if ((ret = JNI_CreateJavaVM(&jvm, (void **)&env, &args)) < 0) {
            /* error */
        }classPath is just a char* that lists all the Jars the project uses. I wrote a Java main() to test my code and when you run it with the exact same classpath, it works.
The Java code that creates and starts the SAX parser looks like:
     XMLHandler handler = new XMLHandler ();
     SAXParserFactory factory = SAXParserFactory.newInstance();
        SAXParser saxParser = factory.newSAXParser();
        try {
             saxParser.parse(f, handler);
        } catch (java.io.IOException e) {
             e.printStackTrace ();
        } catch (Exception e) {
             e.printStackTrace ();
        }Is there something about JNI that SAX stuff won't work with it?
Any help is greatly appreciated.

Answer 1

D'oh!
The java test code that "worked" actually used the wrong file name so the file didn't exist so it didn't actually execute the broken code.
When I hard-code the absolute path to the file, I still get "Unable to read from file". So I guess the problem isn't with the JNI but somewhere else in my code.
Thanks.