Master..xp_cmdshell Error

I keep getting a "Incorrect syntax error near ' -Q''' " which is at the end of my xp_cmdshell line. What am I doing wrong?


CREATE Procedure dbo.sp_ImportRawData
(@ClientAbbrev nchar(4), @FileDate nvarchar(8), @SessionId nvarchar(50) )
AS
DECLARE @Msg varchar(255)
DECLARE @DataUpdates nvarchar(255)
DECLARE @Common nvarchar(255)
DECLARE @UServer nvarchar(255)
DECLARE @FullFileName nvarchar(68)
DECLARE @FileName nvarchar(64)
DECLARE @FileExt nvarchar(3)
DECLARE @SQL varchar(3500)
DECLARE @triFileName nvarchar(255)

Declare @Ip_FileName nvarchar(255)
Declare @Ip_Active char(1)



select @UServer = sd_value from Msysdata Where SD_Property = 'UpDateServer'
select @Common = sd_value from Msysdata WHERE SD_Property = 'CommonDir'
select @DataUpdates = sd_Value from Msysdata WHERE SD_Property = 'DataUpdate'

Set @UServer = @UServer + 'D$'

SET @Msg = 'Truncate tri_ active files'
EXEC MARS_SYS.dbo.sp_WriteLog @ClientAbbrev, 'UpdateMgr', @Msg, @FileDate, @SessionId



Declare ActiveFile Cursor For
Select Ip_FileName, Ip_Active from tbl_InputFiles
where Ip_Active = 'Y'

Open ActiveFile
Fetch Next From ActiveFile
Into @Ip_FileName, @Ip_Active


While @@Fetch_Status = 0
Begin

Exec('truncate table tri_'+ @Ip_FileName)
Set @FullFileName = @Ip_Filename + '.csv'



set @UServer = ''
set @Common = ''
set @triFileName = 'tri_' + @Ip_FileName

set @sql = 'master..xp_cmdshell ''' + @UServer + @Common + 'd:mars_syscommonscriptsodbcbcp -D CopyMedMgr10_Testing -i D:mars_sysdataupdatesccbm' + @FullFileName + ' -Q''' + @triFileName
exec(@SQL)

Fetch Next From ActiveFile
Into @Ip_FileName, @Ip_Active

End

CLOSE ActiveFile
DEALLOCATE ActiveFile