RMAN duplicate fails when source database has been backed up using the "section size" option

Hi,

I am using 11.2.0.3 on Redhat and having a problem when attempting to clone  a database using RMAN Duplicate from location.

I am attempting to speed up the store and restore process of our databases which use large files.

So, e.g. we have a single file of 600G.

I used the SECTION SIZE parameter and set it to 100G.

run {

        delete noprompt obsolete device type disk;

        backup

        section size 100G

        database

        format '/dbbackup/$ORACLE_DBNAME/backupset/df_%t_s%s_p%p.bus'

        plus archivelog delete all input

        format '/dbbackup/$ORACLE_DBNAME/backupset/arch_%t_s%s_p%p.bus';