PDR1240S
<FIELD> fieldname cannot contain <ONPAGE> because it is a <PAGE> field.
What happened: You specified an <ONPAGE> tag in the Field group to define the top of page. Since Enrichment does not know where page is yet, you cannot tell it to look for the field on a specific page.
What to do: Remove the <ONPAGE> tag from the Field group. If you need to pick up the data specified by the field on a specific page, define a second Field group using a different field name and the <ONPAGE> tag.