Hi Karl,

I've changed the method a bit, and I expect some of the tweaks to fix the 
issue.
I don't have an easy way to test it on Windows, so please load 
Monticell-ul.701, or just update your Trunk image, reenable the 
preference, and let me know if it helped or stayed the same.

Levente

On Sat, 14 Sep 2019, karl ramberg wrote:

> I have not seen this error since I disabled preference "Use shared WebClient instance"
> We should consider disabling that preference on Windows.
> I'm not sure how to do platform specific preferences....
> 
> Best,
> Karl
> 
> 
> On Tue, Sep 10, 2019 at 9:23 PM karl ramberg <karlramberg at gmail.com> wrote:
>       Debug log
> 
> Best,
> Karl
> 
> 
> On Tue, Sep 10, 2019 at 12:06 AM Levente Uzonyi <leves at caesar.elte.hu> wrote:
>       Hi Karl,
>
>       Does the error happen if you disable the "Use shared WebClient instance"
>       preference in the Monticello category?
>       Are you behind a proxy?
>       Do you have a firewall set up filtering outgoing requests?
>       Do you connect to a wifi network, which hijacks requests and forces you to
>       authenticate every once in a while?
>       Does the error happen on a non-windows OS from the same network?
>
>       The stack frame shown in the picture is unreleated to the problem. Is
>       anything readable from the stream instance variable when the error
>       happens?
>
>       Levente
>
>       On Mon, 9 Sep 2019, karl ramberg wrote:
>
>       > This has been an issue on Windows for a long time.
>       > When updating the image the first try always fails with this error.
>       >
>       > See screenshot
>       >
>       > Best,
>       > Karl
>       >
>       >
>       > bild.png
>       >  
>       >
>       >
>       >
>       >
> 
> 
>