backup error

Hi,

we have an SP that is used in SQL 2005 to backup our logs

USE [master]
GO
/****** Object: StoredProcedure [dbo].[dba_logbackup] Script Date: 03/07/2013 15:18:49 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

ALTER PROCEDURE [dbo].[dba_logbackup]

AS

-- Transaction log backup (Full / Bulk Logged recovery model databases)

SET NOCOUNT ON

PRINT CONVERT(VARCHAR, GETDATE(), 113)
SELECT ''

DECLARE
@isDefault NVARCHAR(255),
@dataPath NVARCHAR(255),
@defaultBackupPath NVARCHAR(255),
@workPath NVARCHAR(255),
@workBackupPath NVARCHAR(255),
@regKey NVARCHAR(255),
@cmd NVARCHAR(4000),
@databaseName SYSNAME,
@backupFileName NVARCHAR(255),
@backupSetId INT,
@backupSetName NVARCHAR(128)


-- Get default backup directory
SELECT @isDefault = COALESCE((CONVERT(VARCHAR(75),SERVERPROPERTY('Inst anceName'))),'MSSQLSERVER')
SELECT @regKey = 'SOFTWARE\Microsoft\' + @isDefault + '\MSSQLSERVER'
EXEC master.dbo.xp_regread
@rootkey = 'HKEY_LOCAL_MACHINE',
@key = @regKey,
@value_name = 'BackupDirectory',
@value = @defaultBackupPath OUTPUT


-- Create working directory
SELECT @workPath = @defaultBackupPath + '\BACKUP_JOB'

SELECT @workBackupPath = @workPath + '\BACKUP'
SELECT @cmd = 'MKDIR ' + @workBackupPath
EXEC master.dbo.xp_cmdshell @cmd


-- Backup all database transaction logs
DECLARE db_cur CURSOR FOR
SELECT name,
@workBackupPath + '\' + name + '_Log.bak',
name + '_log_backup'
FROM master.dbo.sysdatabases
WHERE dbid <> 3 -- model
AND Databasepropertyex(name, 'Recovery') <> 'SIMPLE'
AND NOT( status & 32 = 32
OR status & 64 = 64
OR status & 128 = 128
OR status & 256 = 256
OR status & 512 = 512
OR status & 1024 = 1024
OR status & 2048 = 2048
OR status & 4096 = 4096
OR status & 32768 = 32768
OR status & 262144 = 262144 )

OPEN db_cur

FETCH NEXT
FROM db_cur
INTO @databaseName,
@backupFileName,
@backupSetName

WHILE @@FETCH_STATUS = 0
BEGIN
PRINT 'Backing up DB log: ' + @databaseName

BACKUP LOG @databaseName
TO DISK = @backupFileName
WITH NOFORMAT,
NOINIT,
NAME = @backupSetName,
SKIP,
NOREWIND,
NOUNLOAD,
STATS = 10

IF @@ERROR <> 0
BEGIN
PRINT 'Backup failed'
GOTO NextDatabase
END

SELECT @backupSetId = position
FROM msdb..backupset
WHERE database_name = @databaseName
AND backup_set_id = ( SELECT MAX(backup_set_id)
FROM msdb..backupset
WHERE database_name = @databaseName )

IF @backupSetId IS NULL
BEGIN
RAISERROR(N'Verify failed. Backup information for database %s not found.', 16, 1, @databaseName)
PRINT 'Verify failed'
GOTO NextDatabase
END

RESTORE VERIFYONLY
FROM DISK = @backupFileName
WITH FILE = @backupSetId,
NOUNLOAD,
NOREWIND

NextDatabase:
FETCH NEXT
FROM db_cur
INTO @databaseName,
@backupFileName,
@backupSetName

PRINT CONVERT(VARCHAR, GETDATE(), 113)
SELECT ''
END

CLOSE db_cur
DEALLOCATE db_cur


scripting it out & running it in 2008 R2 returns the following error

Msg 3044, Level 16, State 2, Procedure dba_logbackup, Line 76
Invalid zero-length device name. Reissue the BACKUP statement with a valid device name.
Msg 3013, Level 16, State 1, Procedure dba_logbackup, Line 76
BACKUP LOG is terminating abnormally.

i've found this link which suggests we are using a NULL device name

Invalid zero-length device name. Reissue the BACKUP statement with a valid device name Archives - SQL Server Consultancy & Training

however the TO DISK line in out script is TO DISK = @backupFileName

accidental dba here