Oracle database error code ORA-31660 – metadata filter name can not be defaulted

Oracle Database Error Code ORA-31660 Description :
metadata filter name can not be defaulted
Error Cause:
A null metadata filter name was supplied.
How to Solve :
Fix the call to specify a metadata filter name.

Oracle Database Error Code ORA-30464 Description :
no summaries exist
Error Cause:
A call was made to refresh_all_mviews, but no summaries exist. At least one summary must exist before calling refresh_all_mviews
How to Solve :
Create one or more summaries