generating chinese TOC ?

I am running FrameMaker 12 and have some trouble generating a chinese TOC. The font is SimHei and it is simplified chinese. Most of the TOC seems to work ok, but some headlines come out like this:

"openXmlElementId ../../../../../../Manual/FM filer/AQUA/R02 - Chinese/Aqua Blue HW - Chinese R02.fm:<$UniqueXmlElementId<$RelativeXmlElementId"

I can't figure out what is amiss. It seems that it should not be a font issue - but then what is it?

Can anybody please help?

best regards

Bjørn