Sage 100

I am trying to do an import for warehouse transfers for a client with Scanco MB.   I cannot get the bins to import to the T record.   I can't see anything missing. They are on 2020 Advanced   Any ideas?   I am starting to wonder if it will work at all on this version - seem to remember running into this before.   I have tried adding and removing some of the fields but still always the same error.  The log for the distribution does not seem to 'see' the bin location fields.