Error in variable type

This is the error message received:
Capture Data: Unable to cast object of type ‘SelectListIterator2[Abbyy.FlexiCapture.WebApi.Client.Models.MemoryFile,System.Collections.Generic.KeyValuePair2[System.String,System.Byte]]’ to type ‘System.String’.

I have tried changing the variable type to array of string as mentioned but that too didnt help.

Could anyone please help me to resolve it.

@Anandha_Krishnan
Please make a screenshot of the expression And the assign activity

@Anandha_Krishnan

As per error the source type is the big one you see and you are trying to assign to array of string which might not be possible

cheers

Thanks all, The issue has been resolved.