XMLPort export not respecting record filters (NAV2016)

Hi all,

I'm trying to export specific records using an xmlport but the record filters are not applied, so the whole table gets exported.

SalesShipmentHeader.SETFILTER("No.",DocumentFilter);
IF NOT SalesShipmentHeader.ISEMPTY THEN
XMLPORT.RUN(XMLPORT::"Shipment Export",FALSE,FALSE, SalesShipmentHeader);

I've tried using XMLPORT.EXPORT in the same manner, with the same result.
XMLPortVariable.EXPORT has the same behavior.
I've tried GETs/FINDFIRSTs instead of ISEMPTY. Same thing.

If I show a COUNT on the SalesShipmentHeader first, it shows the number of records I expect. But the resulting XML still contains the whole table.

Any suggestions?

Gr, Erik