DSXchange

I do have a reject link coming out of the xfm. From what I can see the same column in the reject file is set to Nullable = "Yes". If there is some other property than I haven't set it.

EE can be such a pain in the arse with null handling. Try what I said in previous post and see if that get's rid of the first warning.

You could also try adding in a modify stage between CFF and Tfm to change the fields properly from Non-nullable to nullable, or I think sometimes if you added in a copy stage with the column defs changed from input to output, if it's from non-nullable to nullable, it may accept that.

I was going to advise the modify stage as well. Give both these strategies a short.
EE is very particular as its skeleton is built over a strongly typed language(C, C++). Hence its always advised as a first step to take care of all data type conversions and stick to it till the very end.

Thanks Nick. Thanks everybody. I will try to mess with the settings and see if anything improves.