OraOLEDB error '80040e4b'

Greetings experts,

My partner that handles classic ASP (yes, we still use it) but he is on vacation for a month and I am backing her up.

I have not used classic ASP in more than 10 years.

Yesterday, one of our users tried to search for her parcel on the website and ran into the following error:

The system cannot find message text for message number 0x80040e4b in the message file for OraOLEDB
D:\config/FunctionSubTyler1.inc, line 62

Here is the function where the error is coming from:

Function check_null_var(var)
    If IsNull(var) Then
        check_null_var = ""
    Else
        check_null_var = var
    End If
End Function

and the offending line (line 62) is on this line:

    Else check_null_var = var

Any ideas why this is causing the problem?

Thanks in advance for your help