There are two general types of materials that cannot be sent between campuses: reserves and reference materials. The "Place Hold" button should not appear for either of these types.
You can check the item type by clicking on the title to view the detailed record. At the bottom, where it lists which location(s) have a copy, you'll see a column for Material Type: if you see "reserve" or "reference" (or just a "non-circulating" note), you can confirm that this is not a requestable item.
If the item looks normal but you still can't place a hold, please email uplibrary-circ@lonestar.edu with your account info, the title you're trying to request, and any details about the error message you might be getting (which might be as simple as "Hold not allowed").