Workaround for RMAN-04014: startup failed: ORA-27069: attempt to do I/O beyond the range of the file when using dbca

Late night error when trying to create a cdb out of the same ORACLE_HOME as an older, non-cdb database:

dbca reports:

[ 2024-10-03 18:34:35.876 CEST ] Prepare for db operation
DBCA_PROGRESS : 10%
[ 2024-10-03 18:34:35.956 CEST ] Copying database files
DBCA_PROGRESS : 40%
DBCA_PROGRESS : 100%
[ 2024-10-03 18:35:04.332 CEST ] [FATAL] Recovery Manager failed to restore datafiles. Refer logs for details.
DBCA_PROGRESS : 10%
DBCA_PROGRESS : 0%

Detailed log file shows:

RMAN-03015: error occurred in stored script Memory Script
RMAN-04014: startup failed: ORA-27069: attempt to do I/O beyond the range of the file

Potential cause: your memory is too small to hold the extra instance you are attempting to create.

Potential solution: scale your total memory up. If necessary, adjust hugepages to fit the extra instance.