IDoc import error

Hi,

When i am trying to import IDoc, system displaying the following error message

**Ready for import**

Import started...

AIDMATMAS.MATMAS01:

+ com.sap.aii.ibrep.sbeans.upload.RemoteUploadException: You cannot create new objects since the system is not the original system of the software component version

Import failed with 1 error

What could be the problem? reply me ASAP