* NullPointerException on passing arguments to function..

[Kumar, Vinay 2]

hello,

i've created a TOMCAT/AXIS web service
& calling it as shown below:

////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////
java.lang.Boolean status;
mService = new org.apache.axis.client.Service();
mCall    = (org.apache.axis.client.Call) mService.createCall();
mCall.setTargetEndpointAddress(new java.net.URL(mUrl));
/* 
* calling function: boolean Init( String str1, String str2, String str3)
*/
status = (java.lang.Boolean)mCall.invoke("Init", new Object[] {str1, str2,
str3});
/* 
* calling function: boolean State()
*/
status = (java.lang.Boolean)mCall.invoke("State, (java.lang.Object[])null);
////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////

this code works fine, if i'm not passing arguments to function
enlisting the error stack

pl. suggest


java.lang.NullPointerException
        at
org.apache.axis.message.SOAPFaultBuilder.endElement(SOAPFaultBuilder.java:13
4)
        at
org.apache.axis.encoding.DeserializationContext.endElement(DeserializationCo
ntext.java:671)
        at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1489)
        at org.apache.crimson.parser.Parser2.content(Parser2.java:1700)
        at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1468)
        at org.apache.crimson.parser.Parser2.content(Parser2.java:1700)
        at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1468)
        at org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:499)
        at org.apache.crimson.parser.Parser2.parse(Parser2.java:304)
        at
org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:433)
        at javax.xml.parsers.SAXParser.parse(SAXParser.java:346)
        at
org.apache.axis.encoding.DeserializationContext.parse(DeserializationContext
.java:204)
        at org.apache.axis.SOAPPart.getAsSOAPEnvelope(SOAPPart.java:378)
        at org.apache.axis.client.Call.invoke(Call.java:1268)
        at org.apache.axis.client.Call.invoke(Call.java:1113)
        at org.apache.axis.client.Call.invoke(Call.java:1043)
        at org.apache.axis.client.Call.invoke(Call.java:1069)
        at GenericApplet.actionPerformed(GenericApplet.java:160)
        at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
        at
javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(Unknown
Source)
        at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown
Source)
        at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown
Source)
        at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
        at java.awt.Component.processMouseEvent(Unknown Source)
        at java.awt.Component.processEvent(Unknown Source)
        at java.awt.Container.processEvent(Unknown Source)
        at java.awt.Component.dispatchEventImpl(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.EventQueue.dispatchEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown
Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown
Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source)