Answered

The If-Match header contain invalid value

(0) Share

Report

Posted on by johnjohnPter

1,936 Season of Giving Solutions 2025

I want to update the title of a planner using graph api as per this documentation https://learn.microsoft.com/en-us/graph/api/plannerplan-update?view=graph-rest-1.0&tabs=http where it mentioned to send this request:-

so i am sending this request using send http action:-

but i am getting this error :-

I also tried without W/ >> so i only pass this value "JzEtVGFzayAgQEBAQEBAQEBAQEBAQEBAWCc=" ... but got the same error..

so not sure why it is not accepting the If-Match, although i specify the exact value as per the documentation.

any advice?

Thanks

Categories:

Building flows

I have the same question (0)

All responses (9)

Answers (1)

Sort by

ivan_apps 2,189 Moderator on at

Like (1)

Report
Copy link

Link copied!

Found this help post with a similar issue and resolution, give it a shot:
https://stackoverflow.com/questions/56246949/how-to-fix-update-plannertaskdetails-if-match-header-contains-an-invalid-val

https://powerusers.microsoft.com/t5/Using-Connectors/Custom-Connector-Graph-The-If-Match-header-must-be-specified-for/td-p/144092

Ensure you are retrieving the etag that is corresponding to your planner instance, using the same one as in the example seems like it should fail. Also try the different variations of escaping the double quotes and see if power automate adds quotes for you as well.

Was this reply helpful? Yes No
johnjohnPter 1,936 Season of Giving Solutions 2025 on at

Like (0)

Report
Copy link

Link copied!

i already read all those links before i posted my question, but none of them worked.. i tried 3 variations:-

If-Match: W/"JzEtVGFzayAgQEBAQEBAQEBAQEBAQEBAWCc="

If-Match: "JzEtVGFzayAgQEBAQEBAQEBAQEBAQEBAWCc="

If-Match: JzEtVGFzayAgQEBAQEBAQEBAQEBAQEBAWCc=

but none of them worked for me,, any advice please?

@ivan_apps

Was this reply helpful? Yes No
ivan_apps 2,189 Moderator on at

Like (0)

Report
Copy link

Link copied!

How are you obtaining the IF-Match etag? I don’t believe yours should match the one from the example request.

Was this reply helpful? Yes No
johnjohnPter 1,936 Season of Giving Solutions 2025 on at

Like (0)

Report
Copy link

Link copied!

@ivan_apps I am not obtaining it from anywhere.. i think it need to be provided as-is

Was this reply helpful? Yes No
ivan_apps 2,189 Moderator on at

Like (0)

Report
Copy link

Link copied!

Take a look at the stack overflow article again. The issue maybe isn’t that the format is wrong, rather it doesn’t correspond to anything in your environment. One person resolved the same error message you are getting by using the proper etag they retrieved from ‘task details’ as opposed to ‘tasks’.

retrieve your planner instance and examine the output. See if there is an odata.etag or something similar and use that value instead.

Was this reply helpful? Yes No
johnjohnPter 1,936 Season of Giving Solutions 2025 on at

Like (1)

Report
Copy link

Link copied!

@ivan_apps using this If-Match worked for me:-

Was this reply helpful? Yes No
Verified answer

Expiscornovus 33,851 Most Valuable Professional on at

Like (1)

Report
Copy link

Link copied!
Hi @johnjohnPter,

I see you are already retrieving the value Id of the field. Are you by any chance using the List plans for a group type of action?

If that is the case, that action is already returning the ETag value and you can dynamically add it to your PATCH request via an expression (so you don't have to worry about the format like when hardcoding the value).

Below is an example

{ "Content-Type": "application/json", "If-Match": "@{items('Apply_to_each')['@odata.etag']}", "Prefer": "return=representation" }

Was this reply helpful? Yes No
johnjohnPter 1,936 Season of Giving Solutions 2025 on at

Like (0)

Report
Copy link

Link copied!

@Expiscornovus yes your approach worked perfectly and better than hard coding the value. thanks

Was this reply helpful? Yes No
ivan_apps 2,189 Moderator on at

Like (1)

Report
Copy link

Link copied!

Well done 👍

Was this reply helpful? Yes No