If you get this error
Failed to open disk scsi0:0: Unsupported and/or invalid disk type 7. Did you forget to import the disk first? Unable to create virtual SCSI device for scsi0:0
chances are that your VM was created with an ealier version of vmware and it is not quite compatible with the version 7. When that happens just download the vmware converter and convert your vm to the new version.