Showing results for 
Search instead for 
Did you mean: 
Not applicable

Error opening file: Cannot read property 'connectionInstanceId' of null

A project that I had recently edit can no longer be opened.  Now getting an error opening file message that states "Cannot read property 'connectionInstanceId' of null"


Can someone please help?


I have modified the app so it skips the buggy screen but still cannot remove that screen.

Hi @serastpan,


We have a fix for the error you came across and it should ship in an upcoming release.


Also, I've seen this error when there are formulas consuming the Updates property of a Gallery control. I have seen users try to use the Gallery.Updates property as the rule for a Form control. This isn't going to achieve what you want. If you are using the form control in New mode (inserting new records instead of editing existing ones), then it is not required to have a rule for the Item property. Gallery.Updates also doesn't provide the form a record that would be editable in the form's data source.



Thank you for your reply Spencer.

Helpful resources

PA User Group

Welcome to the User Group Public Preview

Check out new user group experience and if you are a leader please create your group

MBAS Attendee Badge

Claim Your Badge & Digital Swag!

Check out how to claim yours today!


Demo Extravaganza is Back!

We are excited to announce that Demo Extravaganza for 2021 has started!

MBAS on Demand

Microsoft Business Applications Summit sessions

On-demand access to all the great content presented by the product teams and community members! #MSBizAppsSummit #CommunityRocks

Power Apps June 2021

June Power Apps Community Call

Don't miss the call this month on June 16th - 8a PDT

Top Solution Authors
Top Kudoed Authors
Users online (15,370)