I am having a strange error with an RMAN backup failing due to a missing spfile

Starting Control File and SPFILE Autobackup at 10/05/2016 15:19:08

released channel: d1

RMAN-00571: ===========================================================

RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============

RMAN-00571: ===========================================================

RMAN-03009: failure of Control File and SPFILE Autobackup command on d1 channel at 05/10/2016 15:19:09

ORA-01565: error in identifying file '/apps/oracle/product/11.2/db_1/dbs/spfileppptt1r.ora'

ORA-27037: unable to obtain file status

Linux-x86_64 Error: 2: No such file or directory

Additional information: 3

I am using Oracle 11.2.0.3 and an ASM file system.  We are using an spfile, but since it is an ASM filesystem , it is located at +DATA/PPPTT1R/PARAMETERFILE/spfile.303.911472519. Why would it looking for an non-existing spfile, and how can I remove it from RMAN?  Thanks so much.