How to default the charge account that is passed via FBDI for project based purchase orders

Summary:

Hi Experts ,

We are trying to upload the project based Purchase orders via FBDI where we want to default the charge account that has been entered in the FBDI.

We understood that we need to define an account rule to achieve this. However the below rule (see the code snippet section)has been defined but still we could not default the charge account and it is erroring out ,please help what need to be done here.

Content (required):

Version (include the version you are using, if applicable):

21c

Code Snippet (add any code snippets that support your topic, if applicable):