java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at Thor.API.Operations.tcUserOperationsClient.isChallengeQuestionsSetForSelf(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at Thor.API.Base.SecurityInvocationHandler$1.run(Unknown Source)
at weblogic.security.subject.SubjectProxy.doAs(SubjectProxy.java:64)
at weblogic.security.subject.SubjectManager.runAs(SubjectManager.java:262)
at weblogic.security.Security.runAs(Security.java:48)
at Thor.API.Security.LoginHandler.weblogicLoginSession.runAs(Unknown Source)
at Thor.API.Base.SecurityInvocationHandler.invoke(Unknown Source)
at Thor.API.tcUtilityFactory.(Unknown Source)
at com.vaau.rbacx.iam.oracle.OIMIAMSolution.getUtilityFactory(OIMIAMSolution.java:2269)
at com.vaau.rbacx.iam.oracle.OIMIAMSolution.readUsers(OIMIAMSolution.java:717)
at com.vaau.rbacx.iam.service.impl.RbacxIAMServiceImpl.importUsers(RbacxIAMServiceImpl.java:118)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at undefined.$Proxy70.importUsers(Unknown Source)
at com.vaau.rbacx.scheduling.executor.iam.IAMJobExecutor.execute(IAMJobExecutor.java:78)
at com.vaau.rbacx.scheduling.manager.providers.quartz.jobs.AbstractJob.execute(AbstractJob.java:72)
at org.quartz.core.JobRunShell.run(JobRunShell.java:202)

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