Critical Error #-2147217887 Multiple-step OLE DB operation generated errors

Question

I've converted an access DB to an SQL express DB using the built in upsizing wizard in MS access. But I now get an error when I try to programmatically add a record to the SQL server table:

Critical Error #-2147217887 Multiple-step OLE DB operation generated errors.

The field that this fails on is when I'm setting the SQL Field [notes]. I'm trying to set it to a vbnullstring (using VB6).

The access upsizing wizard created the field as a nvarchar(255) and all nulls to true, it originally was a text field with a length of 255 in ms access.

Is there a problem setting a nvarchar field in sql to a vbnullstring?

Any suggestions on what could be going wrong would be greatly appreciated!

Set RS = OpenRecordsetSQL("SELECT TOP 1 * FROM AvailabilityBlocks WHERE BlockID=-1") 
' ' Add a specific entry to the Availability DB Table ' 
RS.AddNew 
RS("Begin") = wblock.BeginTime 
RS("Type") = wblock.BlockType 
RS("OCampus") = wblock.Campus
RS("End") = wblock.EndTime 
RS("LocationID") = wblock.LocationID 
RS("ResourceID") = wblock.ResourceID 
RS("RecurringSetNumber") = wblock.RWWSetNumber 
RS("Notes") = wblock.Notes 
RS("InternalNotes") = wblock.InternalNotes 
RS.Update 

Answer 1

You should be using Null rather than vbNullString. vbNullString is a constant designed to be used when passing data to APIs. Null is the VB representation of a null value. NULL in the database sense.

One issue you have is that in VB a String cannot be Null. You can of course use VB's variant datatype so declare Notes as

Notes as Variant

Then either

wblock.Notes = "some text"

or

wblock = Null