Case . . . When . . . Then . . . BULK INSERT

I'm trying to wrap the following in a Stored Procedure:

SELECT
		(
			CASE
				WHEN (
					select Count(*) FROM [dbo].[HistoryTable] WHERE MonthlyFileWritten 
					= convert( varchar, dateadd(dd,-1,dateadd(mm, datediff(mm,0,getdate() ), 0)),112)
				) <= 1 
				THEN
					declare @fullpath1 varchar(1000)


OTHER STUFF HERE .  . . . THIS WORKS FINE OUTSIDE OF THE CASE WHEN THEN

					--Insert EOM Date into History Table
					INSERT INTO [London_Data].[dbo].[HistoryTable]([MonthlyFileWritten])
					VALUES (convert( varchar, dateadd(dd,-1,dateadd(mm, datediff(mm,0,getdate() ), 0)),112))
				ELSE
					--PRINT 'NOTHING'
				END
				)
END
GO

I've been fiddling with this for a while; still not working at all.  Can you NOT use Bulk Insert with CASE WHEN THEN?

It seems like you should be able to do that!!

Any thoughts anyone?

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