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I'm trying to build a flow with a lookup component. However, I'm always getting the error :

Must provide either 'fields' or 'layoutTypes' when providing childRelationships param.

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Here are the parameters of my flow component.

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It seems that all field API Name, Object API Name and RecordId fields are OK, as I doubled checked it.

Do you have any idea about why this error arises ?

  • It might be related to the fact that I have a Lookup Filter on this lookup field. When deactivation this lookup filter, everything seems to work fine – Hugo Oct 22 '19 at 15:04
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I had this same issue but without lookup filters. What I had to do for the record Id was use a variable to get the record providing the existing value then reference the field that has the value I wanted. Just referencing the recordId didn't work.

So, for example, say you have a variable that gets the Customer__c called getCustomer to get the reference record. For Record Id you'd enter {!getCustomer.Billing_Contact__c}

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