Relationship must be on the same number of fields with the same... Neuro Guest Posts: n/a 's Computer Specifications 19th Jan 2010 When I attempt to make a 1-to-many relationship between two tables, I'm getting the error: "Relationship must be on the same number of fields with the same data types". I've double checked that both data types are "text" and I don't understand how they could possibly be on different number of fields. I have a table of names that are being called to the main table via a combo-box. This works fine except that I cannot filter by the names in that field within a query because I cannot "enforce referential integrity" while setting the relationship. I have set up quite a few 1-to-many relationships in the identical way (I think) and I don't understand why I'm getting an error in this case. Thanks for your help! Jeff Boyce Guest Posts: n/a 's Computer Specifications 19th Jan 2010 Which field(s) in which tables are you using to try to set that relationship? More info, please... Regards Jeff Boyce Microsoft Access MVP -- Disclaimer: This author may have received products and services mentioned in this post. Mention and/or description of a product or service herein does not constitute endorsement thereof. Any code or pseudocode included in this post is offered "as is", with no guarantee as to suitability. You can thank the FTC of the USA for making this disclaimer possible/necessary. "Neuro" &lt;(E-Mail Removed)&gt; wrote in message news:088B30FD-0C5C-4B55-ADD6-(E-Mail Removed)...