Deploying map nodes in a WebSphere Message Broker flow generates a DTXPluginNode error or JVM pointer error

Diagnosing The Problem

When you deploy a WMB flow that contains a WTX Map node, an error with the following content can occur:
The broker received an instruction to create a message flow node of type 'DTXPlugInNode', in message flow '<flow name>'. The broker cannot create nodes of this type because an implementation library for this node type does not exist in the LIL path.

Ensure that the LIL path is correct, and that it contains all the required node implementation libraries, including those supplied by IBM.

Or the deployment of the WMB flow times out or hangs. The WMB service trace contains JVM pointer error messages that are similar to the following messages:

+cciServiceTrace '++ WTX: entering _setUpJni'
2012-05-03 18:57:16.091927 7198 >> +cciServiceTrace '!! WTX ERR: Failed to retrieve the JVM pointer (rc = 0, ptr = 0). The WTX initialization sequence was NOT completed successfully.'
2012-05-03 18:57:16.091936 7198 >> { ::cciMbsToUcs , (*ptr)11856c850, 'txmsgv84', (*ptr)11856c878, 20, 1208
2012-05-03 18:57:16.091942 7198 >> } ::cciMbsToUcs , 9
2012-05-03 18:57:16.091946 7198 >> +cciUserTrace file: line:0 message:1001.txmsgv84 'general trace' , 'WTX Node initialization failed during JNI initialization (rc = -1).'
2012-05-03 18:57:16.091946 7198 >> UserTrace BIP2176S: Could not find message 1001 in catalogue /mybroker/broker_8_0_0_0/messages/En_US/txmsgv84.cat, inserts are 'WTX Node initialization failed during JNI initialization (rc = -1).' {1} {2} {3} {4} {5} {6}