Hi Dennis,
The structure of your documents seems to be correct.. But the data aren't.
In all documents, ParentKey is the N° of the document in OWTR, so in your case 2.
Nothing to say regarding WTR1...
BTNT:
- BatchNumber should have the value that you put in BINS.SerialAndBatchNumbersBaseLine
BINS:
- ParentKey should be 2,
- BaseLineNumber is the N° of the item's line in WTR1,
- BinAbsEntry has to be filled with the AbsEntry of the bin receiving goods,
- In LineNum, put the same number as in BaseLineNumber,
- SerialAndBatchNumbersBaseLine should be the number of the line for the corresponding batch in BTNT
Don't hesitate to resend a corrected project, if it still doesn't work 
Regards,
Eric