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Help - My indexes disappear!

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    Help - My indexes disappear!

    I have a table with 5 defined indexes. My user calls and says he is getting errors when clicking on a button which sets an index and then finds by standard key. I go and open the table in design mode, check indexes and they are all gone! Not a one! I copy the .cdx file from a backup and they are back. Next day, another call; same problem. Indexes are wiped clean! What causes this? Where do I Look?
    Jim Belanger

    Re: Help - My indexes disappear!

    A search of the message board will reveal that Alpha automatically deletes indexes in which each key cannot be evaluated. i.e. if the data necessary to define a single index key is missing or corrupt the index tag will be deleted from the CDX. This process does not delete the CDX file itself. The cure is to carefully check the indextag definitions against the data. Is there a mismatch between fieldnames used in tag spec and the fieldnames used in the table structure? Are you using filtered indexes in cases where the filtering criteria may not be available 100% of the time?

    -- tom


      Re: Help - My indexes disappear!

      Thanks Tom. Boy, I haven't changed anything in this file for two years and it's been working fine. Besides, all 5 indexes being deleted?? Can changes in another table of the set cause index losses in a different table? There have been recent changes in indexes and field rules in a parent table in a set where the one losing indexes is a child table. I'll check and double check but, you explanation would explain losing one index, not all of them!! You are right, I don't lose the .cdx file but it's empty. I'll let you know what I find.
      Jim Belanger


        Re: Help - My indexes disappear!

        Jim, have you added or changed any operations that might be overwriting the dictionaries and the CDX?


          Re: Help - My indexes disappear!

          Hi Jim,

          I'd take a look at backup programs or other system wide scheduled processes that might be backing up in an inappropriate way such that they cause a corruption of the index file (possibly because users are currently in Alpha at backup times).

          It may also be virus scanners that might be causing the problem. Try turning it off for those directories and see if the problem goes away.

          Ira J. Perlow
          Computer Systems Design

          CSDA A5 Products
          New - Free CSDA DiagInfo - v1.39, 30 Apr 2013
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            Re: Help - My indexes disappear!

            No, no changes. As a matter of fact, I took out the one table from the application. I used ONLY that table in a new application called indexbug.adb. When I run an update operation (Post Parts Orders) that has been working for several years (yes, I've double checked the operation and even redid it to ensure no corruption) the index file gets wiped out and the program locks up. I sent in the application created as a bug report but I'm now not so sure because I tried running it with A5V8 (because it's been working with that all along) and it locks that one up too. I am attaching it, if you want to take a look.
            Jim Belanger


              Re: Help - My indexes disappear!

              There is no update op with the name you supplied. Care to drop a few more bread crumbs so we can find the trail?


                Re: Help - My indexes disappear!

                Hi Tom
                Well, I copied the zip file I sent you to a new subdirectory and unzipped the file. I then saw a .adb file and opened it. Under operations, I see an operation with the name Update Parts Orders. I don't have any idea why you don't see it. How can I spread crumbs for you?

                Sorry, I said Post parts orders and I should have said Update Parts Orders.
                Jim Belanger


                  Re: Help - My indexes disappear!

                  I just tested, and it updates successfully, but it takes a lonnnnnnngggggggg time. And, after it completes, if I go to the table and right click to design indexes, it is greyed out and unavailable.

                  Is this something that is run as a batch, like once a day, or does it run after making a record change?
                  Last edited by martinwcole; 07-12-2008, 12:33 PM.
                  Cole Custom Programming - Terrell, Texas
                  972 524 8714
                  [email protected]

                  "A young man who is not liberal has no heart, but an old man who is not conservative has no mind." GB Shaw


                    Re: Help - My indexes disappear!

                    Hi Martin
                    First, let me say this. I sent the zip file to my brother Bill and he is getting the same problem I am. I had also sent it in as a bug report and I have already received a reply from Selwyn who says he can reproduce the problem and is trying to find out why it is doing that. This is part of a four step process, all action scripts that execute one after the other. The first three process fine. They append an order record to an "orders" table, they create a PO Header. The next step is to update the parts file to show that the following fields are updated, qty on order, need, logical order y/n and qty total ordered over a period of time. It is this step that hangs up the program. My brother Bill said it executes OK without indexes so I should try it by defining one index at a time to see which index makes it hang up. I probably should have thought of that myself.
                    Jim Belanger


                      Re: Help - My indexes disappear!

                      You may want to review the release notes for build 1593-3195 if you use table.external_record_content_get() anywhere in your code. Under some circumstances, using this function would strip indexes from a table. That was fixed in build 1593-3195.


                        Re: Help - My indexes disappear!

                        Thanks, I will. I have since discovered that the first index "Unique Key" in the parts table is what was causing the problem and, as far as I can tell, I did not add that index there. I suspect A5 added it but not sure when or why. When checking my A5V8 application, I found that index was not there, yet it appeared after two weeks using A5V9. I have since deleted the index and everything is working fine and, as yet, the index has not re-appeared. It may, when I do something else Alpha doesn't like but so far, so good.
                        Jim Belanger