WARNING:NFS mount of file +ORA-19600: input file is control file

Issue
+++++
RMAN duplicate is failing with below error.

RMAN ERROR
=============
channel ch00: restoring control file
ORA-19625: error identifying file /erpoltp1/dbdata/backup/stage/_em_backup_/cf_D-ERPOLTP1_id-494164440_95kmfdq3_system01.dbf
ORA-27037: unable to obtain file status
SVR4 Error: 2: No such file or directory
Additional information: 3
ORA-19600: input file is control file (/erpoltp1/dbdata/backup/stage/_em_backup_/cf_D-ERPOLTP1_id-494164440_95kmfdq3_system01.dbf)
ORA-19601: output file is control file (/erptest1/dbdata/data1/cntrl01.dbf
failover to previous backup

Error in alert logfile
+++++++++++++++++++++++
WARNING:NFS mount of file /backup/rman/erpoltp1/cf/bk_utsosavab_s204732_p1_t835026251_bk on filesystem /backup/rman_0008 done with incorrect options
WARNING:Expected NFS mount options: rsize>=32768,wsize>=32768,hard,
WARNING:NFS mount of file /backup/rman/erpoltp1/cf/bk_utsosavab_s204732_p1_t835026251_bk on filesystem /backup/rman_0008 done with incorrect options
WARNING:Expected NFS mount options: rsize>=32768,wsize>=32768,hard,
WARNING:NFS mount of file /backup/rman/erpoltp1/cf/bk_utposauv5_s204729_p1_t835025893_bk on filesystem /backup/rman_0008 done with incorrect options
WARNING:Expected NFS mount options: rsize>=32768,wsize>=32768,hard,
WARNING:NFS mount of file /backup/rman/erpoltp1/cf/bk_utposauv5_s204729_p1_t835025893_bk on filesystem /backup/rman_0008 done with incorrect options
WARNING:Expected NFS mount options: rsize>=32768,wsize>=32768,hard,
WARNING:NFS mount of file /backup/rman/erpoltp1/db/ERPOLTP1_db_urnosaumm_s204663_p1_t835025622_db on filesystem /backup/rman_0008 done with incorrect options
WARNING:Expected NFS mount options: rsize>=32768,wsize>=32768,hard,
WARNING:NFS mount of file /backup/rman/erpoltp1/db/ERPOLTP1_db_unhoph7m2_s200433_p1_t832085698_db on filesystem /backup/rman_0008 done with incorrect options
WARNING:Expected NFS mount options: rsize>=32768,wsize>=32768,hard,

++++++++
SYMTOMS
++++++++
oratest@ctsst11 $ grep -i event initerptest1.ora
*.event='10298 trace name context forever, level 32'

*.event='4030 trace name heapdump level 25'

Solution :
+++++
Keep First event parameter in parameter file and remove the second one.