BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Pesky Error          BorlandTalk.com Forum Index -> Delphi Databases (Multi-Tier) View previous topic :: View next topic   Author Message Codeman56 Guest Posted: Wed May 03, 2006 6:03 pm    Post subject: Pesky Error Hello everyone. I am fairly new to Delphi, but have been coding for many years in other languages. Anyway, I have this pesky error. EDatabaseError message: 'Cannot perform this operation on an open database'. This is why its so odd. My application runs perfectly in both runtime and development modes. I have a TDBGrid on one screen that I need to add a field to. I open the project, open the form with the DBGrid on it, and open my projects form where all of my datasets and querys are located. I open the code editor for the appropriate query, and simply add a.fieldname to the Select statement. At this point everything will run perfectly still. I then double click my query to open the fields list. I click Add and the new field I added to the select statement is there. I click it to add it and save all. When I now try to run this application it gives me the error. If I go back into the query and remove that field and save, it still gives me the error and the only way I can get the error to stop is to replace my project with a backup copy. What am I missing here? Why is adding a simple field to a query making this error happen. Doing that is not opening the database a second time? I'm stumped..... Please respond in small steps as I am learning. Thanks... Back to top Riki Wiki Guest Posted: Tue May 09, 2006 10:14 pm    Post subject: Re: Pesky Error On 3 May 2006 10:30:59 -0700, Codeman56 wrote: Quote: What am I missing here? Hoi You need to repost your message on the Borland news server to make everybody see it and possibly answer your message. 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