[mapguide-users] MGOS 4 Final Release and Data Selection

[David Bowen]

Thanks everyone for your suggestions. Based on the feedback, we identified
the issue being Nulls in a Date formatted field in the database table. On
our install, there doesn't appear to be an issue with Nulls present in
fields formatted differently.

On Thu, Jul 9, 2026 at 10:38 AM Dan Nilsson <Dan.Nilsson at tyrens.se> wrote:

> I suspect that it is because it is a numeric value that contains null, and
> there is a bug in the function that returns value in MapGuide that causes
> null value to give an error. Is there probably information about this in
> the log file for MapGuide? Kind regards, Dan
>
>
> Dan Nilsson, Projektledare, Tyréns Sverige AB
> *M:* +46707501701 *E:* Dan.Nilsson at tyrens.se
>
>
> ------------------------------
> *Från:* mapguide-users <mapguide-users-bounces at lists.osgeo.org> för David
> Bowen via mapguide-users <mapguide-users at lists.osgeo.org>
> *Skickat:* Thursday, 09 July 2026 16:29:15
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> *Kopia:* David Bowen <dbowenrci at gmail.com>
> *Ämne:* [mapguide-users] MGOS 4 Final Release and Data Selection
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> We're experiencing an issue where random items on the map won't select,
> even though the layer is set to be selectable. I've been unable to identify
> a common setting between the various layers that are experiencing this
> issue.
>
> In the below image, the outermost lines are selectable (labelled as “S”),
> however the inner ones are not selectable (labelled as “NS”), unless you
> also select one of the outer lines. We're getting similar behaviour in
> other layers that correspond to different tables.
>
> Has anyone else encountered this issue? We're using MGOS 4 Final Release.
> We don’t encounter this issue in an environment that’s set up with MGOS 4
> Beta 2, reading from the same database. Additionally, I'm not noticing any
> entries in the error logs that would point to the issue.
>
> Thanks,
>
> David
>
> [image: image.png]
>
>
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