Type mismatch error

I am getting the following error:
Microsoft VBScript runtime (0x800A000D)
Type mismatch: '[string: "MND3"]'

at the following line of code:
CCID = Right(Request("CourseNumber"),Len(Request("CourseNumber") - 3))

It's a simple problem: as part of a data string I am receiving an identity that is either one or two numbers long and is sometimes prefixed by the letters MND
(say MND3 or MND62). I need to strip the MND out and use only the numbers. The code used follows:

If Left(Request("CourseNumber"),3) = "MND" then
CCID = Right(Request("CourseNumber"),Len(Request("CourseNumber") - 3))
Else
CCID = Request("CourseNumber")
End If

The logic seems sound, but I am getting the type mismatch error.

Any ideas how to fix it?

You have:

CCID = Right(Request("CourseNumber"),Len(Request("CourseNumber") - 3))

Try this instead

CCID = Right(Request("CourseNumber"),Len(Request("CourseNumber")) - 3)

Notice the closed parenthesis before the -3?

Smartbs
www.accessneeds.com