Dear Support Team,

We updated webbrowser from 2015 version to 2017. Since 2017 version we sporadically get the following exception: This WebView either has already been destroyed or is being destroyed.
I already found some posts (EO.Pdf.HtmlToPdf.ConvertHtml : WebView either has already been destroyed or is being destroyed; This WebView either has already been destroyed or is being destroyed). But in this posts it seems to be a problem in PDF library and we don't use PDF library.

In our case we load an URL in Webview. In this webview we're running our web application. In this web application we have different masks. We navigate through some masks via http requests with xml content. This requests are sent e.g. after clicking a button. While navigating through our masks we sporadically get a blank screen and nothing happens. After reloading the webpage, or laoding a new one, we get the above mentioned exception and the whole wpf application crashes.

We never had such problems. It's just since 2017 version of webbrowser.

I tried to look for an error in DevTools, but no success. All requests seem to be ok. When the blank screen appears, the DevTools are broken too. In Chrome everything works fine.

I tested the following WebBrowser versions:
- problem occured in versions: 2017.0.64.0, 2017.0.95.0, 2017.2.0.0, 2017.2.43
- after going back to version 2015.4.5.0 everythings works fine. The requests are just slower


After crash I got following stacktrace:

at EO.Base.Runtime.a(Object A_0, Exception A_1, Boolean A_2)
at EO.WebBrowser.WebView.s()
at EO.WebBrowser.WebView.a(String A_0, Boolean A_1)
at EO.WebBrowser.WebView.LoadUrl(String url)
at myProject.mywebview.loadUrl(String url)

When I call loadUrl() webview and webcontrol are not null and both of them don't seem to be broken or destroyed. I don't understand, why webview is crashing.


So my question is: How can I detect the webview crash when blank screen appears? I just get the exception, when it's too late. I just get it when I am trying to load an new URL. I don't get any event or error when browser is crashing. I can't really find a way to find out what is causing the crash.
Or do you know a quick fix or a heplful setting?

Thank you in advance!

Best regards

Hi,

Thanks for your quick response and the information!
Unfortunately we are not able to create a test project. The crash randomly appears while navigating through our masks in our web application. We have one HTML page. In this page we are drawing our content. A web application can have several masks with different content. E.g. when clicking a Button, we're communicating with our backend via HTTP. The backend sends HTTP Requests with XML content to the web application. This XML contains all information about the new mask, which is then drawn in the HTML document.
Summarized: In our wpf application we load only one URL to start the web application. This web application uses only one HTML to display different content, which it receives from the backend via HTTP.

I handle WebView's Closed event now. The reason for closing is RenderCrash.
I also enabled CrashLog. You should have some entries. Our ApplicationID for Crashlog is a29530de-ca8e-47aa-8394-87078e5615a5.
I hope this information can help you finding out the reason for the crash.

Best Regards

Hi,

thanks for your reply! Unfortunately we also can't really reproduce this crash, because it is very random. But we don't switch our page. We are always on the same page. We only have one loadUrl() call and then we only change the content of this page.
I looked up our requests in WireShark and all our request are fine. No request is canceled. All requests have status code 200.
Nevertheless the webview is crashing.

I also recognized an other rendering problem: Sometimes images are missing in our masks.


After clicking somewhere in this mask the images are shown.


We also can't hover these image buttons in developer tools elements. The blue overlay is missing for these gui elements.

Do you know such rendering issues? Or can you give an estimated release date for webview render crash fix? We have much trouble with that crash at our customers.

Thank you in advance!

Best regards

@Phillip
In the same boat, been installing every update since waiting for it to go away.
Impossible to reproduce due to internal enterprise application and low appearance rate (~1 in 6000 opened views), but always at the first request in that view).
Seems we must just wait and see, but you can safely stop tearing your hair out over your own code i suppose :)

Hello,

Does anyone know if this issue has been fixed yet? We have been having this problem as well. Seeing the issue with version EO.2017.2.14.0

Thanks for any feedback!

Thanks! Do you have an ETA?

Since that would seem to be another ~2~ months we can't wait that long. Is there a way to download an older version of control that works? OP mentioned they do not have the issue with version 2015.4.5.0. How do we get to older builds?

Thanks for your help.

Hi. Im getting this same issue, using version 18.1.31.0, referencing the site http://harvestkorp.com/. I've tried this site with my own implementation and the sample projects and they all fail. Hopefully this helps reproduce/resolve the issue?

Hey. Thanks for the pointer. I tested with setting EO.Base.Runtime.EnableEOWP = true and that site now loads. Thanks again