A relational database management system (DBMS) from Oracle, which runs on more than 80 platforms. Introduced in the late 1970s, Oracle was the first database product to run on a variety of platforms from micro to mainframe. Starting in 1999 with Version 8

The specific group: ORA Messages

Oracle Exception Messages

The specific error code:

Chosen lang:
ORA-19951cannot modify control file until DBNEWID is completed
Cause:Wait until NID completes before attempting the operation.
Action:An operation requiring to modify the control file was attempted, but a NID change is in progress.