I thought of sharing a validation rule which will work only while creation of record and it will not work while editing the record

--> just give one additional condition as && ( ISNULL(CreatedDate )

(Since validation rule will check the createdDate field before its been created in DB)

Migrated dataloader CLIQ scripts from Solaris to AIX Scripts are WORKING WELL IN SOLARIS BUT GETTING ERROR IN AIX AS BELOW

2012-12-05 05:53:55,652 INFO  [main] controller.Controller initLog (Controller.java:388) - The log has been initialized
2012-12-05 05:53:55,665 INFO  [main] process.ProcessConfig getBeanFactory (ProcessConfig.java:103) - Loading process configuration from config file: /u01/psoft/epm900_851/bin/SFDC/dataloader_QA/cliq_process/EXPORT/config/process-conf.xml
2012-12-05 05:53:55,937 INFO  [main] xml.XmlBeanDefinitionReader loadBeanDefinitions (XmlBeanDefinitionReader.java:315) - Loading XML bean definitions from file [/u01/psoft/epm900_851/bin/SFDC/dataloader_QA/cliq_process/EXPORT/config/process-conf.xml]
2012-12-05 05:53:56,110 FATAL [EXPORT] process.ProcessRunner topLevelError (ProcessRunner.java:238) - Unable to run process EXPORT
java.lang.NullPointerException
        at com.salesforce.dataloader.controller.Controller.<init>(Controller.java:105)
        at com.salesforce.dataloader.controller.Controller.getInstance(Controller.java:211)
        at com.salesforce.dataloader.process.ProcessRunner.run(ProcessRunner.java:110)
        at com.salesforce.dataloader.process.ProcessRunner.run(ProcessRunner.java:100)
        at com.salesforce.dataloader.process.ProcessRunner.main(ProcessRunner.java:253)

version and operating system

Data loader :dataloader-25.0.2-uber.jar
CLIQ : 2.2.0
OS:AIX duccaspshcm03 1 6 00F6F0844C00

JAVA:
java version "1.6.0"
Java(TM) SE Runtime Environment (build pap6460sr9fp1-20110208_03(SR9 FP1))
IBM J9 VM (build 2.4, JRE 1.6.0 IBM J9 2.4 AIX ppc64-64 jvmap6460sr9-20110203_74

I am not able to find out the error. Please reply if i need to do any changes in configuration when we move to AIX. Everything is working well in Solaris. Please help .