BACKUP fails for Medium

Hello,

I have the folling problem: I have defined a parallel Backup medium:

/SAV12/bw2/BWD/DAT/DAT1' FILE,'/SAV22/bw2/BWD/DAT/DAT2' FILE BLOCKSIZE 8 NO CHECKPOINT MEDIANAME 'PAR_F_A'

The Backups of the Medium were always working. But in recent Times Backups are failing in Step 2 with the following error mesage:

Job 2 (Backup / Restore Medium Task) [executing] WaitingT203 Result=3700
Error in backup task occured, Error code 3700 "hostfile_error"
Backupmedium #2 (/SAV22/bw2/BWD/DAT/DAT2) Cannot create backup medium
Backup error occured, Error code 3700 "hostfile_error"

Therefore I defined a Second Backup medium:

SAVE DATA QUICK TO '/SAV12/bw2/BWD/DAT/DAT1' FILE,'/SAV22/bw2/BWD/DAT/DAT3' FILE BLOCKSIZE 8 NO CHECKPOINT MEDIANAME 'PAR_F_A1'

The Backups for this medium are working properly

Why does the Backup for the first Medium does not work anymore ?

Kind Regards

Hartwig Latz