Can not backup pluggable database of noarchivelog container database?

Hello Experts,

I want to backup a PDB of a non archive logged Container Database. When I run the script,
run{
alter pluggable database PDBORCL close;
backup pluggable database PDBORCL;
alter pluggable database open;
}
I get following error-
RMAN-06817: Pluggable Database PDBPROD cannot be backed up in NOARCHIVELOG mode.

Kindly guide.How can I achieve this?

Thanks n Regards.