Unable to open backup log '%1'

Item Value
SQLCODE 119
Constant SQLE_UNABLE_TO_OPEN_BACKUP_LOG
SQLSTATE WB011
Sybase error code 13776
ODBC 2 State OK
ODBC 3 State OK
Parameter 1 backup log filename

Probable cause 

The server was unable to open the backup log to record the execution of a BACKUP or RESTORE statement. Check the settings of the environment variables used to locate the backup log file. The directory to contain the log must already exist.