JDBC Look-up/GUID variable problem

Good day,

We are trying to do a JDBC look up. but we get an exception. my job now is to determine where and why do we get this exception.

<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>

- <!-- Request Message Mapping

-->

- http://sap.com/xi/XI/Message/30" xmlns:SOAP=" http://schemas.xmlsoap.org/soap/envelope/">

<SAP:Category>Application</SAP:Category>

<SAP:Code area="MAPPING">RUNTIME_EXCEPTION</SAP:Code>

<SAP:P1>Thrown: java.lang.NullPointerException: while try</SAP:P1>

<SAP:P2>ing to invoke the method java.lang.String.length()</SAP:P2>

<SAP:P3>of an object loaded from local variable 'guid'</SAP:P3>

<SAP:P4>at com.sap.guid.GUID.parseHexGUID(GUID.java:1046)~</SAP:P4>

<SAP:AdditionalText />

<SAP:Stack>Runtime exception occurred during mapping</SAP:Stack>

<SAP:Retry>M</SAP:Retry>

</SAP:Error>

Can you please assist. what possibilities could exist for making this object this stack trace is referring to NULL>

thank you.

Jeezy