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Filters Keep Disappearing a while ?

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  • Filters Keep Disappearing a while ?

    Hello all

    I have discovered a strange issue

    i am developing a Auction System Desktop for live auctions.

    the issue is in the form properties filters

    i have 3 tables


    filter "none"
    order expression auction_id

    filter Auction__id = Var->vAuction
    order Bidder_id

    filter Auction__id = Var->vAuction
    order Lot_number

    for some reason after running the application various number of times the filters simply just disappear e.g.

    last run

    filter "none"
    order expression auction_id

    order Bidder_id

    filter Auction__id = Var->vAuction
    order Lot_number

    any ideas?

    thanks in advance

  • #2
    Re: Filters Keep Disappearing a while ?

    Separate forms for each table?

    Single form based on a set of tables? If so, describe the linkages.

    Are routines in place to assure that the variable (vAuction) has been initialized and populated BEFORE the form(s) are opened?

    Are routines being run that would reset the base level queries in the form(s)?

    Trevor, in many apps the kinds of relationships you're describing here would be displayed without using a variable or a filter. One would simply create a set, with the auctions table as parent. Bidders and Items would be linked (separately) to Auctions via the auction_id field. A form based on this set would automatically "filter" bidders and items showing only those that are linked to the parent table. No filters need to inserted into the properties of such a form to accomplish this.


    • #3
      Re: Filters Keep Disappearing a while ?

      I am interested if a solution/reason can be found for this as well....I had posed a similar question in v5 quite a while ago without resolution...the filter would, over time/use, either just disappear or the word "Table" would be inserted in place of it (which would cause an error as well).

      I have had no issues since that time as rarely use form filters now since learning that they are basequeries and I like more flexibility.
      It is only when we forget all our learning that we begin to know.
      It's not what you look at that matters, it's what you see.
      Henry David Thoreau


      • #4
        Re: Filters Keep Disappearing a while ?

        Originally posted by trev View Post
        for some reason after running the application various number of times the filters simply just disappear
        Yes, and that reason is not because there is a ghost somewhere but rather because in a case like this, those filters represent a query and there is a limit of 16 slots for queries (I think it's 16), once exhausted you are out of luck. That's why I keep saying over and over not to have such filters in a form, but rather run a script to run a query using these filters, then detach/clear/drop the query at the end of the script to clear the slot.

        With that said and if my explanation holds water, then I wouldn't exclude the idea that this is a bug as alpha should clear those slots each time. But once again, I don't see the point of having a fixed filter/order in a form when you could do that dynamically.
        Last edited by G Gabriel; 07-14-2010, 01:36 PM.