Link execution failed: java.lang.NullPointerException

Hi,

I am getting the following exception when my transaction is invoked through a webservice. But when I run my transaction locally inside MII workbenc I am not getting this error. Can any one help me on this. Thanks in advance

Message: [Transaction: 10] Link execution failed: java.lang.NullPointerException

Date: 2010-09-08

Time: 10:00:08:850

Category: /Applications/XMII/Xacute/Event

Location: com.sap.xmii.bls.engine.TransactionInstance

Application: sap.com/xapps_xmiiear

Thread: Thread[HTTP Worker [@1446328205],5,Dedicated_Application_Thread]

Data Source: j2ee\cluster\server0\log\applications_00.log

Arguments:

DSR Transaction: c8d528b0bb1e11df8d9e00237dea9928

Message Code:

Session: 0

Transaction:

User: Guest

Time Zone: +0200

CSN Component:

DC Component: sap.com/xapps_xmiiear

Correlation ID: 207072750000000004

DSR Root Context ID: C8D528B0BB1E11DF8D9E00237DEA9928

DSR Connection: c8d528b0bb1e11df8d9e00237dea9928

DSR Counter: 0

Log ID: 00237DEA9928014A0000000500000664

Host: ALURCB-DEV01

System: MRD

Instance: J20

Node: server0

Thanks

Shaji