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ruyls
New Member

Unknown error on Attachment datacard

I have a Power Apps form linked to a Sharepoint list, it was working fine and now suddenly (I think perhaps since refreshing the data) getting an “unknown error” on a DataCard.

 

ruyls_0-1679537367254.png

 

    

ruyls_1-1679537367255.png

Strangely, the “Attachments” column (which is a default Sharepoint column) is not included in the List Settings in Sharepoint.

 

ruyls_2-1679537367256.png

 

I have tried removing the DataCard in Power Apps and re-adding the field and noticed that it doesn’t contain the paperclip icon next to the “Attachments” field name

 

ruyls_3-1679537367257.png

 

Any help would be greatly appreciated!

45 REPLIES 45
Nazia
Frequent Visitor

Worked for me. Thank you.

 

Anonymous
Not applicable

I just found 1 solution to fix this issue. 

 

step1: Get attachments.

OnVisible of Screen : add code below

Set(_SelectedItem, LookUp(YourListName,ID=ThisItem.ID));  // Get Item 

Set(_Attachments_Main, If(_SelectedItem.HasAttachments , _SelectedItem.Attachments , Blank()) ); // Attachments

 

Step2: Update Attachments Data card 

Delete default of attachment data card

Set _Attachments_Main to items property of attachment control 

Set Value of Attachment control to Value (to fix download file error)

HungND19_0-1679988190308.png

 

Done.

 

I think "ThisItem.Attachments" code was return Null instead Blank(). 

 

Hope this help and Hope MS will fix that isse soon. 

Ashwyn
Frequent Visitor

Definitely the authoring version causing the issue. Rolled back to 3.23031.19 . Thank you @OPo 

madrid
New Member

I have same issue, been trying to rollback to previous authoring version without success, PowerApps is forcing me to use 3.23032.12 no matter what authoring version I want to change.

Tried other fix like remove the default ThisItem.Attachments and put it back <= still not working for me. 😞

Thank you so much! This helped for me too

NB3
Regular Visitor

Hi All

 

I also have the same issue... what can i put in Default to change this?

 

Thank you

Dear all,
having same issues with attachments. Trying to downgrade the authoring version as mention above, but getting another error:

jakubsychra_0-1680166265934.png

Any clues? Thank you in advance!

Big thanks for the solution! Note that it can be further simplified by just changing the DataCard's Default value to this:

If(ThisItem.'Has attachments',ThisItem.Attachments,Blank())
JamesTarver
Helper I
Helper I

Same issue here... although it doesn't stop the app/form submission from functioning properly - you just get the annoying "Unknown error occurred" message. 

 

Changing to previous authoring version seems to have fixed (3.23031.19). 

PDSmith
Frequent Visitor

I have encountered the same error.

 

I thought I may have introduced the error in the last couple of days so I reverted to some code from months back and the error persisted.

 

The fix suggested by "eltibu" did not work for me. 

 

I have two screens. The first screen is a simple gallery. And the other screen is dedicated to adding attachments to the item from that gallery.

 

I receive the error If I navigate to the attachment screen for an item in the gallery that has no attachment.

(But if I return to the gallery and then go back again to the attachment screen for that same item the error does not appear.)

 

Also, I do not receive the error if I navigate to a gallery item that already has attachments.

 

I find the Canvas Power APP still works as expected if I just dismiss the red error banner.

 

Not sure that helps but maybe it's a clue for someone.

 

 

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