Restore folder isn't complete

ashik bangalore
i am having two program backup for the same ABB robot, with same configuration. We did the new programming recently with a new module.Now we tried to restore the old backup. But it is showing that 

Unable to perform the restore request

Restore folder isn't complete

we didnt changed anything on the backup file and also we didn't changed any robot configuration also. 

Any help is appreciated. (looking for immediate response)