Error in importing CAR files

Hi  Friends,

Here i am facing an issue with CPS jobs while importing event chains and Job chains. I am getting the following Error.

ERROR 2014-09-16 13:32:28,257 UTC [Redwood Job Thread Pool: GLOBAL.System.System worker 0] job.System_Import_Archive.23567761 - Import failed, no objects have been imported.

-- JOB RUN STACK TRACE --

java.util.zip.ZipException: error in opening zip file

at java.util.zip.ZipFile.open(Native Method)

at java.util.zip.ZipFile.<init>(ZipFile.java:114)

at java.util.jar.JarFile.<init>(JarFile.java:133)

at java.util.jar.JarFile.<init>(JarFile.java:70)

at sun.net.www.protocol.jar.URLJarFile.<init>(URLJarFile.java:72)

at sun.net.www.protocol.jar.URLJarFile.getJarFile(URLJarFile.java:48)

at sun.net.www.protocol.jar.JarFileFactory.get(JarFileFactory.java:68)

at sun.net.www.protocol.jar.JarURLConnection.connect(JarURLConnection.java:104)

at com.redwood.scheduler.model.imprt.JarDerivedUrlConnection.connect(JarDerivedUrlConnection.java:49)

at com.redwood.scheduler.model.imprt.CronacleArchiveReader.importAll(CronacleArchiveReader.java:82)

at com.redwood.scheduler.system.jobs.CronacleArchiveImport.runInternal(CronacleArchiveImport.java:397)

at com.redwood.scheduler.system.jobs.CronacleArchiveImport.run(CronacleArchiveImport.java:193)

at com.redwood.scheduler.system.jobs.CommonSystemJob.execute(CommonSystemJob.java:53)

at com.redwood.scheduler.systemjobservice.impl.JobWorker.doWork(JobWorker.java:253)

at com.redwood.scheduler.infrastructure.workqueue.Worker.run(Worker.java:76)

at java.lang.Thread.run(Thread.java:679)

Thanks ,

Mohana.