Unable to process template language expressions for Action 'Apply to each 2' at line 0 and column 0 error due to array not being able to be selected

[EDH2022]

Full error code: "Unable to process template language expressions for action 'Apply_to_each_2' at line '0' and column '0': 'The template language expression 'outputs('Start_and_wait_for_an_approval')?['body/responses']' cannot be evaluated because property 'body/responses' cannot be selected. Array elements can only be selected using an integer index. Please see https://aka.ms/logicexpressions for usage details.'."

Explanation of the general process:

A line in sharepoint is created, If certain conditions are met an email is sent to a list of people based on variables inside the updated sharepoint. A 'Start and wait for an approval' is started, email is sent with a multiple choice question. One option is selected and there is a comment box. Once that email is responded to, the response fills in the same row that was initially updated in sharepoint.

My questions are:

 - What does it mean when it says line 0 column 0?

 -  It seems like its failing at the very end when it goes to select the responses from the email what would make it fail if it was working fine a week ago?

 - Do I have to assign an integer index to the array for it to select?

I can post pictures of the flow if needed

[MYSTERIO9000]

Please someone reply to this.  I am having the exact same issue!

[v-jefferni · Accepted solution]

Hi @EDH2022 ,

This error message usually occurs when selecting dynamic values from a nested array, i.e. the 'outputs('Start_and_wait_for_an_approval')?['body/responses']'. 

To solve the issue, you can initialize string variables, in the Apply to each control of the response details append response dynamic values to the variable. You need to note that responses from the approval are from multiple approval recipients so you will have to combine them together and populate into a single column of SP list item.

The expression I framed is to combine the responder emails with change line and populate to the Title column of SP list.

Hope this helps.

Best regards,

Community Support Team _ Jeffer Ni
If this post helps, then please consider Accept it as the solution to help the other members find it.