entering suppliers in R12

 Hello All, we pay a lot of individuals and as a result we enter the postcode after the Supplier name & in the taxpayer ID fields so that we can easily sort or select them, e.g. we have a number of Davies's.

We have intermitently obtained error messages whilst doing this and we have to set up the supplier without the postcode and then go in a second time & edit the fields to put it in. Has anyone else had this problem and got a solution?

Thanks Chris