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Form design - strange problem

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    Form design - strange problem

    A set my form is based on called orders.set consists of 3 tables:

    Order_Header
    Order_items
    Vendor

    The form name is Purchase_Orders

    However, when I enter design mode in the form I get listed another table Invoice_Header which is a table in the database but shouldn't be anything to do with this form - I cannot understand why it is being shown and any attempt to use any of the fields (by dragging them from the sidebar) for this invalid table results in the following error:

    See Error1.jpg and Error2.jpg

    As you can see in the screen shots the invalid table is clearly shown on the right hand side of the screen but I am at a loss to know how it got there!

    Maybe some corruption?

    How do I get rid of this invalid table?

    Any suggestions?

    Thanks,

    Alastair

    #2
    Re: Form design - strange problem

    Hi Alastair,

    Try Database Compact, that is usually the first thing to try?
    Regards
    Keith Hubert
    Alpha Guild Member
    London.
    KHDB Management Systems
    Skype = keith.hubert


    For your day-to-day Needs, you Need an Alpha Database!

    Comment


      #3
      Re: Form design - strange problem

      Hi Keith,

      Thanks for looking, I have tried Database compact, but it didn't help unfortunately.

      Comment


        #4
        Re: Form design - strange problem

        Hi Alastair,

        Build another Set and a new form then see if you have the same result.
        Regards
        Keith Hubert
        Alpha Guild Member
        London.
        KHDB Management Systems
        Skype = keith.hubert


        For your day-to-day Needs, you Need an Alpha Database!

        Comment


          #5
          Re: Form design - strange problem

          i have the same errors sometimes.
          what i do is close alpha5 and re-open it again. sometimes the problem goes away... and sometimes i am thinking of moving to a5v9...lol
          Francis

          Comment


            #6
            Re: Form design - strange problem

            Originally posted by Keith Hubert View Post
            Build another Set and a new form then see if you have the same result.
            Keith is right. Rebuild your form from scratch. You may have a form object w. a bad pointer. If that doesn't work, recreate the set as Keith says. You are right that it is some sort of corruption.
            Peter
            AlphaBase Solutions, LLC

            [email protected]
            https://www.alphabasesolutions.com


            Comment


              #7
              Re: Form design - strange problem

              Hi Peter and Keith,

              Thanks for the suggestions, do you mean by "rebuild the set" to do the following:

              1. Delete the original set that this form is linked to.
              2. Make a new set with same name and tables.

              Or is there another way?

              Comment


                #8
                Re: Form design - strange problem

                Hi Francis,

                I have managed to clear a lot of small problems by re-starting Alpha, but this isn't one of them unfortunately!

                Comment


                  #9
                  Re: Form design - strange problem

                  Hi Peter & Keith,

                  I tried deleting the set, but the form associated with it also got deleted (luckily I had made a backup)! The form contains a lot of code etc.. so I do not want to lose it.

                  Is there anyway of deleting the set without losing the form as well, then re-linking a newly created set to the existing form?

                  Can someone point me to the correct part of the help file that covers this as no matter what I have searched for I do not seem to be able to find anything that covers these problems I am having!

                  I have a few other ideas to try so I will check back here later on.

                  Comment


                    #10
                    Re: Form design - strange problem

                    Well I tried a few more ideas which included editing the set and duplicating the form and when I examined the design of the duplicated form the phantom table had dissapeared. I then examined the original form in design mode and that had also been updated - the trouble is I don't know why...

                    This is very mysterious, anyone know what could have caused this???

                    Comment


                      #11
                      Re: Form design - strange problem

                      What I do in a case like this (doesn't happen very often) is create a new set w. a diff. name. Then copy the old form to the new set. But keep in mind the corruption may possibly be the form itself, not the set. I then drop the old set from the db and move it to a repository (another folder) in case I ever need to go back to it for some reason (better safe than sorry). Then I rename the new set to the old set name, if needed.
                      Peter
                      AlphaBase Solutions, LLC

                      [email protected]
                      https://www.alphabasesolutions.com


                      Comment


                        #12
                        Re: Form design - strange problem

                        Originally posted by Alastair View Post
                        ...when I examined the design of the duplicated form the phantom table had dissapeared...

                        This is very mysterious, anyone know what could have caused this???
                        Form corruption is a mysterious critter. Who knows why? Long as you know how to deal w. the problem.
                        Peter
                        AlphaBase Solutions, LLC

                        [email protected]
                        https://www.alphabasesolutions.com


                        Comment


                          #13
                          Re: Form design - strange problem

                          Thats just it Peter, I have no idea why it suddenly rectified itself???

                          Anyway the main thing is that it has, thanks for your help.

                          Comment


                            #14
                            Re: Form design - strange problem

                            Well, yesterday it had rectified itself, but today it is back!!!

                            Peter you mentioned that you managed to create a new set and link it with the form that was causing you problems, could you provide me a more detailed guide as to how you linked the new set with the existing form?

                            I can't seem to do this!!

                            I am using a pushbutton on another form to copy data on that form to a table which this form uses, could that be why this phantom table is appearing in the design screen?
                            Last edited by Alastair; 08-15-2008, 05:15 AM. Reason: Additional info. added

                            Comment


                              #15
                              Re: Form design - strange problem

                              Originally posted by Alastair View Post
                              Peter you mentioned that you managed to create a new set and link it with the form that was causing you problems, could you provide me a more detailed guide as to how you linked the new set with the existing form?
                              Create a new set just identical to the old one. Of course you will need to give it a different name. From the CP, Forms tab, right click the form you want to copy to the new set and select "copy to" (see attached image). Select the new set. Do that for all forms and any other objects that you may have. Keep in mind that if the corruption is in the form itself, you will just be copying the same corruption to the new set. That's why building an identical from from scratch may solve the problem.

                              I am using a pushbutton on another form to copy data on that form to a table which this form uses, could that be why this phantom table is appearing in the design screen?
                              I don't believe so.

                              You can always post the problem set/tables on this board for others to examine. Just include a minimal number of records and minimal structure - and compact first.
                              Peter
                              AlphaBase Solutions, LLC

                              [email protected]
                              https://www.alphabasesolutions.com


                              Comment

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