VBScript Type type mismatch when field type is adNumeric

This article helps you resolve the Type Mismatch error that occurs when field type is adNumeric.

Original product version:   Internet Information Services
Original KB number:   195180


When you perform a numeric comparison or calculation on an adNumeric (131) field type using VBScript, the following errors may be returned:

Microsoft VBScript runtime error '800a000d'
Type mismatch
Microsoft VBScript runtime error '800a01ca' Variable uses an Automation type not supported in VBScript


The errors occur because VBScript cannot properly convert adNumeric values to a valid numeric type.


You can use either of the following two possible workarounds:

  • Convert the adNumeric field using CDbl() or CInt() as in the following example:

     <%@ LANGUAGE="VBScript"%>
     Set oConn = Server.CreateObject("ADODB.Connection")
     oConn.Open "MyDSN", "MyUserID", "MyPassWord"
     set oRS = oConn.Execute("Select list_price FROM DEMO.PRICE")
     Response.Write("List Price * 100 = " & CDbl(oRS("list_price")) * 100)
  • Use JScript, because JScript does not exhibit this behavior.

Steps to Reproduce the Behavior

The following code exhibits the above-mentioned error:

 Set oConn = Server.CreateObject("ADODB.COnnection")
 oConn.Open "MyDSN", "MyUserID", "MyPassWord"
 set oRS = oConn.Execute("Select list_price FROM DEMO.PRICE")'This is the bad line of code, "list_price" is being returned as
 'type adNumeric.
 Response.Write("List Price * 100 = " & oRS("list_price") * 100)