Error in logs - ARIS 7.1

hello,

Could anybody tell me about this error listed below in the log.

I am unable to rectify this since two days.

2015-01-30 09:55:20,509 FATAL    RCM Mailing and BP Export:JavaException: com.idsscheer.aris.cltech.common.core.ariscommon.ServerException: null
2015-01-30 09:55:20,509 FATAL    RCM Mailing and BP Export:Publishing failed.

Cheers