Resolution:
TIBCO MessageBroker 4.1 Engine and TIBCO MessageBroker 4.1 NT Service works fine with JRE 1.4.2 whereas MessageBroker 4.1 Editor has some problems in GUI and is distorted.


For Message Broker Editor
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Modify mbgui.bat for Windows NT and 2000
Modify mbgui.sh for Solaris, Linux, AIX and HP
Use following line to point recommended JRE 1.3.0.

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SET JRE_PATH=%TIB_JRE13_HOME%
***
For example on windows, you can use TIBCO JRE 1.3 installed as part of TIBCO Message Broker Installation with following line

SET JRE_PATH= C:\tibco\jre\1.3.0

For Message Broker Engine
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mbengine.bat for Windows NT and 2000.
mbengine.sh for Solaris, Linux, AIX and HP
Use following line to point recommended JRE 1.4.2.
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SET JRE_PATH=%TIB_JRE142_HOME%
****
Please refer to FAQ1-1W4187 for using extended heap size parameters with JRE 1.4.2

For example on windows, you can use TIBCO JRE 1.4.2 installed as part of TIBCO products Installation with following line

SET JRE_PATH= C:\tibco\jre\1.4.2


For Message Broker NT Service
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By default MB service picks up the JRE information from the registry key (\\HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment).

Use java.library flag in the mbservice.prop to specify the location of JRE installation to be used. Note that this should be the first statement in the mbservice.prop file. This flag takes precedence over the registry entry for JRE.
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java.library==%TIB_JRE142_JVMLIB%
****
For example, java.library=C:/tibco/jre/1.4.2/bin/client/jvm.dll

Please refer to Java (JDK/JRE) documentation to locate java virtual machine and java library path on specific platform.