Hello framework experts,
I am on 24R1 at the moment. I have a scenario to import employee expenses from an external service provider. I created an external payment template and i can successfully import the file. Until here, there is no problem.

In the external file, I have GL account and Cost Center that are mapped to BankTranscationInfo1 and BankTransactionInfo2.
I want to create a workflow that will loop payment lines for the particular load and read the 2 fields and set CodeA and CodeB values.
Here is my first part of workflow. I can read the array.

Here I am assigning variables. But i have an error that I cannot resolve by myself.

Here i want to update the 2 fields.

I am new to workflows and discovering how it works. Anyone to help for this scenario?
Thanks
Furkan