Hello Bill.

Thank you for your reply. That is a very logical way to troubleshoot - I like it.

However, the issue resolved as I mentioned in my reply to Viv.

Thanks again for your help!


>EnumerableRowCollection refers to the results of a LINQ query, but that might be a misleading error relating to something entirely different.
>
>Here's how this fellow .NET newbie handled the problem of installing my first .NET app at a client who has a wide variety of workstations. The app uses winforms and accesses SQL and VFP data.
>
>I wrote 3 little apps.
>The first is Hello World in a winform.
>The second is the first with a simple SQL Query and update
>The third is the first with a simple VFPOLEDB Query and update.
>
>They all ran fine on my system, but each of the three, in certain cases, surfaced issues that had to be addressed on certain workstations.
>
>Once they all were dealt with, the large app which is quite complex, ran without a hitch.
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>>>
>Ok - so I completed my first .NET app (desktop in vb.net and a asp.net web portion), compiled it in x86, install it on WindowsXP (32bit) and Windows 7 (64bit) machines, and it works great. - Hurray :-)
>
>Now i have some Windows XP 64 bit machines where i got an error right when I am starting the app (the desktop program). I think there was some mentioning about the System.Windows.Forms namespace.
>
>Well, so I am thinking to myself: "sure that makes sence, just recompile as "AnyCPU".
>
>Oops - maybe not. First i got some complaints about LINQ - so i converted that code to the System.Data.SqlClient stuff. Still everything works great on the other machienes (reinstalled).
>
>But now i get an error when compiling (not the code sections I converted) as follows (about 72 errors):
>
>Dim MasterTypeRow As DataTable = _
> Me.TableAdapterManager1.DocumentTypesTableAdapter.GetType_Level0( _
> Me.DocList(nRow, 3), Me.DocList(nRow, 4), Me.DocList(nRow, 5))
>
>' this following line triggers the error
>Dim MasterType As String = MasterTypeRow(0)("Type_level0")
>
>throughs the error:
>
>'ElementAtOrDefault' is not a member of 'System.Data.EnumerableRowCollection(Of System.Data.DataRow)'.
>
>Does anybody have an idea what i am missing here?
>
>Thank you for all your help!