BR0255W Cannot read from standard input during a dbverify

Hello,

I am using:

BRBACKUP 7.20 (13)

SunOS 5.10 Generic_144488-06 sun4u

701 SAPSR3

Oracle 11.2.0,.2

brbackup -w only_dbv -t online -c -u / -e 16

It generally runs ok, but today I got:

BR0280I BRBACKUP time stamp: 2011-04-20 11.20.47

BR0063I 5 of 11 files processed - 14900.039 of 73640.086 MB done

BR0204I Percentage done: 20.23%, estimated end time: 12:45

BR0001I **********________________________________________

BR0280I BRBACKUP time stamp: 2011-04-20 11.21.44

BR0281W BRBACKUP interrupted by signal 2

BR0269W Wait situation interrupted - probably cannot continue

BR0280I BRBACKUP time stamp: 2011-04-20 11.21.44

BR0256I Enter 'c[ont]' to continue, 's[top]' to cancel BRBACKUP:

BR0280I BRBACKUP time stamp: 2011-04-20 11.21.45

BR0251W Function gets() failed at location BrConfEnter-1

BR0253W errno 5: I/O error

BR0255W Cannot read from standard input

BR0280I BRBACKUP time stamp: 2011-04-20 11.21.45

BR0261E BRBACKUP cancelled by signal 2

BR0056I End of database backup: befrzrsn.dbv 2011-04-20 11.21.46

BR0280I BRBACKUP time stamp: 2011-04-20 11.21.49

BR0054I BRBACKUP terminated with errors

1. Would you know what yould cause this Cannot read from standard input?

2. Is there a maximum number of process that can/should be passed to -e option?

Thanks in advance for your answer.