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The Alpha Software Forum Participation Guidelines

The Alpha Software Forum is a free forum created for Alpha Software Developer Community to ask for help, exchange ideas, and share solutions. Alpha Software strives to create an environment where all members of the community can feel safe to participate. In order to ensure the Alpha Software Forum is a place where all feel welcome, forum participants are expected to behave as follows:
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Bonus TIPS for Successful Posting

Try a Search First
It is highly recommended that a Search be done on your topic before posting, as many questions have been answered in prior posts. As with any search engine, the shorter the search term, the more "hits" will be returned, but the more specific the search term is, the greater the relevance of those "hits". Searching for "table" might well return every message on the board while "tablesum" would greatly restrict the number of messages returned.

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First, make sure you are posting your question in the correct forum. For example, if you post an issue regarding Desktop applications on the Mobile & Browser Applications board , not only will your question not be seen by the appropriate audience, it may also be removed or relocated.

The more detail you provide about your problem or question, the more likely someone is to understand your request and be able to help. A sample database with a minimum of records (and its support files, zipped together) will make it much easier to diagnose issues with your application. Screen shots of error messages are especially helpful.

When explaining how to reproduce your problem, please be as detailed as possible. Describe every step, click-by-click and keypress-by-keypress. Otherwise when others try to duplicate your problem, they may do something slightly different and end up with different results.

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Problem Opening Set

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    Problem Opening Set

    Hi,

    I have 2 (suppposedly identical) databases both of which contain 9 Tables and a set that links these tables. The databases are called Versuch1 and Versuch2. On opening the set in Versuch1 I am presented with a default form view. When opening the same set in Versuch2 I receive the followng error message:

    "...Error adding relation child '........' [Unknown DOS Error]"

    I have attached the two databases in the hope that somebody may have time to take a look and perhaps have an idea how this can occur.
    This problem came to light as I attempted to integrate changes from my test database to a production database.

    Thanks
    Roger
    Attached Files

    #2
    Re: Problem Opening Set

    Roger

    The indices for the table Students register are different.

    Since the set links to the second instance of Students register via the Current_Class field (and it's not a previously define index) Alpha attempts to build the index for you.

    Since it's the second opening of the same table, Alpha can't get exclusive access to make the index.

    I manually built the index and then all is well.

    If you copy the Students Register.cdx from the working database to the second and update the indices, you'll be working fine also.

    A couple of hints..

    Naming of objects should follow the Alpha guidelines of starting with a letter and containing only letters, numbers, or an underscore.

    I follow that rule with table, set, field, form, browse, report....

    Hope that helps.
    Last edited by Al Buchholz; 10-28-2012, 11:34 AM.
    Al Buchholz
    Bookwood Systems, LTD
    Weekly QReportBuilder Webinars Thursday 1 pm CST

    Occam's Razor - KISS
    Normalize till it hurts - De-normalize till it works.
    Advice offered and questions asked in the spirit of learning how to fish is better than someone giving you a fish.
    When we triage a problem it is much easier to read sample systems than to read a mind.
    "Make it as simple as possible, but not simpler."
    Albert Einstein

    http://www.iadn.com/images/media/iadn_member.png

    Comment


      #3
      Re: Problem Opening Set

      Hi Ali,

      yes easy when you know what to look for. A more informative error message would have saved me days of investigation.
      Thanks a lot for your help.

      Regards
      Roger

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