Cannot find table 0

Hi,

i have a SP that populates a datagridview.

if  i have only SELECT statment is returns the rows  but i need to have if  else and when i do that i get the error of cannot find table 0. the Sp gets data from an xls file dumps it in a temp table then does a lookup to an existing table, the results should be returned to the DGV.

thanks for looking

SELECT @sql = 'SELECT * into  ##GETDATA FROM  OPENROWSET(' +
'''Microsoft.Jet.OLEDB.4.0'', ' +
'''Excel 8.0;DATABASE=' + @FPATH + ';HDR=yes'', ' +
'''SELECT * FROM [SHEET1$]'')'
EXEC(@sql)
If exists (Select * from tempdb.information_schema.columns where table_name = '##getdata' and column_name = 'SIM')
ALTER TABLE ##getdata
 ADD [NUMBER] nvarchar(30) NOT NULL DEFAULT(1)
else if  exists (Select * from tempdb.information_schema.columns where table_name = '##getdata' and column_name = 'NUMBER')
ALTER TABLE ##getdata
 ADD SIM nvarchar(30)
GO
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