Problem creating namespace in SAP PI 7.31

I have created SCV in SLD and imported in to ESR in PI 7.3. But now I am not able to create namespace. It shows below error:

" Runtime error (RuntimeException). See details See error logs for details"

When I see in details of SCV, it shows available supported packages is " Does not exist".

Could you please help me what could be error.

Thanks.