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troubleshooting Question

Bad variable type (0x80020008) SQL Server sp_OAMethod

Avatar of carv99
carv99 asked on
DatabasesDelphiMicrosoft SQL Server 2005
6 Comments1 Solution1454 ViewsLast Modified:
Windows 7 64bit
MS SQL Server 64bit
Delphi 2007

I am trying to pass a string value (lpstr) to a com object I created and I am getting the that Bad Variable error when I run the following code:

  DECLARE @DeductionAmount money
  DECLARE @HResult int
  DECLARE @DLLObject int
  DECLARE @ErrorSource varchar (255)
  DECLARE @ErrorDesc varchar (255)
  EXEC @HResult = sp_OACreate 'TaxLibrary.CalculateTax', @DLLObject OUT
  EXEC @HResult = sp_OAMethod @DLLObject, 'CalculateTax', @DeductionAmount OUT, 1, '00-000-0000'
  IF @HResult <> 0
    EXEC sp_OAGetErrorInfo @DLLObject, @ErrorSource OUT, @ErrorDesc OUT  
    RAISERROR('COM Error 0x%x, %s, %s', 16, 1, @HResult, @ErrorSource, @ErrorDesc)

The definition for that error message is the following:
Bad variable type (0x80020008)
Data type of a Transact-SQL value passed as a method parameter did not match the Microsoft Visual Basic data type of the method parameter, or a NULL value was passed as a method parameter.
I did not use VB to create my com object, but I do not think that matters.  I have the parameter defined as of type lpstr in my com object.  I am not sure how I am to format the SQL any differently.