Skip to Content
Skip to Search
Home

No matching results

Try a different search query.

Search Unavailable

We are making updates to our Search system right now. Please try again later.

Sign In Account
Oracle Account

Account

Help

Sign Out
Oracle Account

Manage your account and access personalized content. Sign up for an Oracle Account

Sign in to my Account

Sign in to Cloud

Access your cloud dashboard, manage orders, and more. Free Cloud Platform Trial

Sign in to Cloud

Database Error Messages

Release

Updated

Oct 13, 2025

ORA-51303

illegal check mask value specified

Cause

An illegal check mask value was specified.

Action

Specify one of the following legal values: COLUMN_CHECKS, ROW_CHECKS, REFERENTIAL_CHECKS, or ALL.