Error in query; "Invalid length parameter passed to the substring function"

Hi
i got errro mess "Invalid length parameter passed to the substring function" from this below. Anyone how can give me a hint what cause this, and how i can solve it? if i remove whats whitin thoose [] it works, i dont use [] in the code :)
colums:
VLF_InfectionDestination is nvarchar 254

SELECT TOP 10 tb_AVVirusLog.VLF_VirusName, COUNT(tb_AVVirusLog.VLF_VirusName) AS number
FROM tb_AVVirusLog INNER JOIN
__CustomerMachines002 ON tb_AVVirusLog.CLF_ComputerName = __CustomerMachines002.FalseName
WHERE (CONVERT(varchar, tb_AVVirusLog.CLF_LogGenerationTime, 120) BETWEEN @.fyear + @.fmonth + @.fday AND @.tyear + @.tmonth + @.tday) AND
(__CustomerMachines002.folder_id = @.folderId) [OR
(CONVERT(varchar, tb_AVVirusLog.CLF_LogGenerationTime, 120) BETWEEN @.fyear + @.fmonth + @.fday AND @.tyear + @.tmonth + @.tday) AND
(tb_AVVirusLog.VLF_InfectionDestination LIKE N'%@.%')]
GROUP BY tb_AVVirusLog.VLF_VirusName
HAVING (NOT (tb_AVVirusLog.VLF_VirusName LIKE N'cookie'))
ORDER BY COUNT(tb_AVVirusLog.VLF_VirusName) DESCGenerally, you get this error when you pass in a bad parameter, like a negative startpoint, or a length parameter that takes you out of bounds of the string. Maybe instead of convert (varchar), you should try convert(varchar(10)). I don't see substring in there.|||naa cant get it to work... that damn error pop up no matter what i do...|||is i reverse the order and put in a AND insteed it works... like this
[AND
(CONVERT (tb_AVVirusLog.VLF_InfectionDestination LIKE N'%@.%')] AND (varchar, tb_AVVirusLog.CLF_LogGenerationTime, 120) BETWEEN @.fyear + @.fmonth + @.fday AND @.tyear + @.tmonth + @.tday)]

how come o got that error the other way?

//Mr|||Read the sticky at the top of this forum..Post us the DDL and some sample data and what the expected results are suppose to be...|||How about this?

DECLARE @.date1 datetime, @.date2 datetime
SELECT @.date1 = CONVERT(datetime, @.fyear + @.fmonth + @.fday)
, @.date2 = CONVERT(datetime, @.tyear + @.tmonth + @.tday)

SELECT TOP 10 a.VLF_VirusName
, COUNT(a.VLF_VirusName) AS number
FROM tb_AVVirusLog a
INNER JOIN __CustomerMachines002 b
ON a.CLF_ComputerName = b.FalseName
WHERE ( a.CLF_LogGenerationTime > @.Date1 AND a.CLF_LogGenerationTime <= @.Date2
AND b.folder_id = @.folderId)
OR ( a.CLF_LogGenerationTime > @.Date1 AND a.CLF_LogGenerationTime <= @.Date2
AND a.VLF_InfectionDestination LIKE N'%@.%')
GROUP BY a.VLF_VirusName
HAVING a.VLF_VirusName NOT LIKE N'cookie'
ORDER BY COUNT(a.VLF_VirusName) DESC|||thx, i manage this to work, and i got some new ideas how to do things... :)

//Mr|||thx, i manage this to work, and i got some new ideas how to do things... :)

//Mr

...and you're not gonna share it with us...I'll never gety thos 5 minutes back...