I have the products orderable separately in the product dictionary, i.e. PC; PC,IRR; PC,IRRA1;PC,IRRA2, etc. I have the associated patient tests for crossmatch, type and screen set up the same for each product as far as I can tell but PC is the only product for which the associated tests are actually automatically ordered. Any ideas on what I could be missing? PC,IRR is a substitute product for PC but the opposite is not true.