Couldn't count correctly today. Ran several imports and for one of them the (solictor relationship) import ID I created was 21 characters. Yes, I ran test file - imported okay. Ran validation, all records were fine. So I clicked import. Only every 10th record imported as due to being a character too long, the ID's were not unique (xxx-20 and xxx-21 were both viewed as xxx-2). Can't there be a warning or something during validation process that alerts me to my mistake? :)