# Error when open dynamo **URL:** \ **Category:** Uncategorized\ **Created:** [August 24, 2026, 4:15pm UTC](https://forum.dynamobim.com/t/error-when-open-dynamo/115128 "2026-08-24T16:15:39Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![RMohareb](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/rmohareb/32/120534_2.png) [@RMohareb](https://forum.dynamobim.com/u/RMohareb)\ **Post date:** [August 24, 2026, 4:15pm UTC](https://forum.dynamobim.com/t/error-when-open-dynamo/115128/1 "2026-08-24T16:15:40Z")
Hi All, After updating Windows and Revit to version 26.5, I can no longer open Dynamo and receive an error message; this error causes Revit to close completely. ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/d/8/d873460e6bcf782519d5cd51b83090b36d4d1ed7.png) ---
**Author:** ![jacob.small](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/jacob.small/32/161030_2.png) [@jacob.small](https://forum.dynamobim.com/u/jacob.small)\ **Post date:** [August 24, 2026, 4:41pm UTC](https://forum.dynamobim.com/t/error-when-open-dynamo/115128/2 "2026-08-24T16:41:27Z")
> [@RMohareb](#): > > After updating Windows and Revit to version 26.5, I can no longer open Dynamo and receive an error message; this error causes Revit to close completely. Do you see anything odd in the Revit journals or Dynamo log files (if such is generating)? ---
**Author:** ![RMohareb](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/rmohareb/32/120534_2.png) [@RMohareb](https://forum.dynamobim.com/u/RMohareb)\ **Post date:** [August 24, 2026, 4:55pm UTC](https://forum.dynamobim.com/t/error-when-open-dynamo/115128/3 "2026-08-24T16:55:08Z")
> [@jacob.small](#): > > e Revit journals 2026-08-24 16:39:09Z : Successfully sent CER error report 2026-08-24 16:39:09Z : Dynamo Unhandled Exception 2026-08-24 16:39:09Z : Couldn’t find a compatible Webview2 Runtime installation to host WebViews. 2026-08-24 16:39:17Z : Successfully sent CER error report [dynamoLog\_f29532ac-cde2-41dc-9f83-a06c41c7bed3.txt](https://forum.dynamobim.com/uploads/short-url/9avH7ygbfHhdY5r0mkiCiOcb9nH.txt) (11.9 KB) ---
**Author:** ![jacob.small](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/jacob.small/32/161030_2.png) [@jacob.small](https://forum.dynamobim.com/u/jacob.small)\ **Post date:** [August 24, 2026, 4:57pm UTC](https://forum.dynamobim.com/t/error-when-open-dynamo/115128/4 "2026-08-24T16:57:51Z")
Ok that’s understandably an issue - webview2 is the framework used for much of the UI in Dynamo. However we aren’t seeing why it’s missing. Can you post your Revit journal too? ---
**Author:** ![RMohareb](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/rmohareb/32/120534_2.png) [@RMohareb](https://forum.dynamobim.com/u/RMohareb)\ **Post date:** [August 24, 2026, 5:00pm UTC](https://forum.dynamobim.com/t/error-when-open-dynamo/115128/5 "2026-08-24T17:00:26Z")
[journal.0283.txt](https://forum.dynamobim.com/uploads/short-url/pahN5eOEZP7mUJWY1nEzRKpN8k9.txt) (265.7 KB) also the revit start with strange behaviour when open. i can open it and work normally. the clash only when open dynamo ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/7/5/750ee9ddb1dc2685e3e25fb5e009d723eae7b29f.png) This happens when updating Windows (not the Revit software). I also tried completely uninstalling and reinstalling Revit, but the problem persists. ---
**Author:** ![jacob.small](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/jacob.small/32/161030_2.png) [@jacob.small](https://forum.dynamobim.com/u/jacob.small)\ **Post date:** [August 24, 2026, 5:34pm UTC](https://forum.dynamobim.com/t/error-when-open-dynamo/115128/6 "2026-08-24T17:34:42Z")
Looks like you’re not seeing anything webview2 related - Revit’s Home page is similarly a webview2 component. Might be a broken windows or .NET, but there isn’t any type of threads to pull in the logs so I’m at a lost. Please reach out to one of my colleagues in support by creating a new ticket at on the accounts portal at [manage.autodesk.com](http://manage.autodesk.com). ---
**Author:** ![RMohareb](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/rmohareb/32/120534_2.png) [@RMohareb](https://forum.dynamobim.com/u/RMohareb)\ **Post date:** [August 25, 2026, 6:50am UTC](https://forum.dynamobim.com/t/error-when-open-dynamo/115128/7 "2026-08-25T06:50:18Z")
> [@jacob.small](#): > > webview2 thanks @jacob.small [https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/Program-crash-on-certain-machines-when-opening-the-Manage-Links-dialog-in-Revit.html?us\_oa=search-us&us\_si=3b15c066-34b8-4a7e-aeca-21c349725c44&us\_st=webview2%20revit](https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/Program-crash-on-certain-machines-when-opening-the-Manage-Links-dialog-in-Revit.html?us_oa=search-us&us_si=3b15c066-34b8-4a7e-aeca-21c349725c44&us_st=webview2%20revit) solve by follow this steps