Some Update 3 problems

I have a work copied in Dorico for marimba that uses a lot of tremolo and was happy when playing back that the rolls sounded good, until they got to a certain configuration that seems to involve whole or half notes that are tied to shorter notes don’t play the tremolo. Ok, so I untied them and they played back. When I tried to export the file as mp3 it played back until it got to the long note tremolos which for some reason just played a single note on each beat.
I tried it again, exporting as mp3 but now , using windows media player, no playback at all. Tried exporting as wav and got the follow (see pics).

WMPplay prob dor.jpg

Can you please send your project to us so we can take a look at it? Please email it to d dot spreadbury at steinberg dot de, and because I get a lot of email, if you could also include a link to this forum thread, that would be very helpful.