I have been writing databases for several years now, so I know my way around access pretty good. I have come upon a strange error though. which is confusing me to now end. I wrote a Database on my work machine which has the latest version of MS Access and SP2 for Office. I just tried to send it to another employee for them to test. Now they do not have the full version of MS Access installed on their machine, they only have the runtime version which only runs the Database. The load works fine and the first screen uses ADO to lookup some value and display them in a list box, nothing crazy, everything works fine. Now using this form, when they click a button the info in the list box is used to set the Fields a new Unbound form. And this is where the error happens. The on_load event of the form fails for some reason, and gives a msgbox which says, "Runtime error occured and the App needs to close", but the prog works fine on my machine. I am baffled. The file is a MS Access 2000 format, I tried changing it to MS Access 2002/2003 Format, and when I do that they cannot open the file because it says they do not have thje latest MS Access version. I have no idea what, why the error occurs, any ideas??