The RemittanceInformationUnstructured is normally limited to be 35 characters long. The limit itself is specified in the bank's API spec.
Usually, the characters exceeding 35 characters limits would be simply removed. But after the recent changes on the bank's side, the limit violation will result in an error.
A better error messaging is expected in the future after the bank makes required changes.
SUPPORT CENTRE
What can we help you with?