Error while executing API AR_CM_APPLICATION_PUB.ACTIVITY_APPLICATION

Hello ,

We are trying to execute the API AR_CM_APPLICATION_PUB.ACTIVITY_APPLICATION to apply a recivable activity of the type "Credit Card Refund" to an on-account Credit Memo.

However, the API is throwing an error saying     " The specified combination of payment schedule identifier and receivables transaction identifier is invalid." .

I have checked on the community and otherwise to find out the reason for this, I was able to find out the following explanation:

"The activity type derived from the receivables_trx_id does not match with the

activity type of the specified payment_schedule_id."

However, it does not mention  which payment_schedule_id. Is it the payment_schedule_id for the Credit Memo I am trying to apply the Refund activitiy to?