RMAN HELP !!!

Run {
allocate channel d1 type disk;
sql 'alter system archivelog current';
backup format '/export/home/backup/al_t%t'
archivelog all
delete input;
release channel d1
}

When I execute above command without connecting to recovery catalog i got following err :

RMAN-06089: archive log /oradata/arch/arch_1_210.arc not found or out of sync with catalog

ne suggetion ???

Has arch_1_210.arc been deleted from OS?

I think you should have connection to the catalog.
Resync the catalog database using:
rman> change archivelog all validate;