The report /SAPAPO/VERSION_CREATE_NO_APO didnt come up with any dialog box. It simply says that model and vesion 000 exists. So coming to a conclusion from the discusion, I suppose that the transactions mentioned in the question should not be present in the EWM component. And in that way our system is functioning properly.
As for the transaction /SAPAPO/MVN, I shouldn't be bothered of its non-existence since the report /SAPAPO/VERSION_CREATE_NO_APO runs fine.
Thank You Juergen.
Regards,
Oritra