a little more info please,such as what you have done up to this point,what program are you using to generate your nv items.usually when nv items wont write it means that either the description of the nv items is wrong or you are writing to an area of the nv that is read only.if you worte the items yourself it is most likely in the description(the number and size of the items)it must be correct for them to write,but will throw and error if not telling you that the size is wrong and doesnt match. if you generated with WR redo it and retry.possible that an area of the nv is corrupt,if this is the case reload the sbf and should work. hope this helps.