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Possible corrupt DBF table or dictionary?

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    Possible corrupt DBF table or dictionary?

    It does not seem like a case of corruption, but I don't know what it IS.

    A client's database went south today while they were using it. About 50 dbf tables. I found about 2/3 of the tables to either do "nothing" when trying to edit a record, or to cause A5 to crash. I was starting to test with a dbf recovery tool, but then found this...

    If I remove the table's dictionary, then records can be edited.
    If I copy just the dbf & cdx to my development database (and use dictionary in development database) then I can edit records.
    If I copy the dictionary files from dev. database to client database (using dbf & cdx from client) then I can't edit records.

    I copied the adb and al? files from development to client, still can't edit.
    Removed master password. Still can't edit.

    For this client I don't use AEX, just copy all dictionaries from development to their folder. So it is puzzling why a client table can be copied to development and work, but it does not work in client folder - even after copied to my development machine.

    Some of these tables are lookup tables and have not changed in years. There are also 6 folders on the client's system with the same database app, and all of them developed the same problem at about the same time. Even a test database that had not been open in 6 months had the problem.

    So I suspected malware/virus. Malwarebytes and MS Security Essentials have found nothing. So far I don't "think" any other of my development databases have contracted the problem after copying the client database to my machine.

    At this point I am stumped.


    Re: Possible corrupt DBF table or dictionary?

    Oops. I This should have been in the desktop section.

    The problem turned out to be the Cryptolocker trojan. Fortunately there are backups. Unfortunately the encryption process started about 1/2 hour before the next 12 hour backup. Could have been much worse.

    Last edited by Al Buchholz; 05-09-2014, 10:02 PM. Reason: moved


      Re: Possible corrupt DBF table or dictionary?

      Good news - sounds like you were lucky you didn't get the virus if you downloaded their data back to your computer.
      Cole Custom Programming - Terrell, Texas
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      "A young man who is not liberal has no heart, but an old man who is not conservative has no mind." GB Shaw


        Re: Possible corrupt DBF table or dictionary?

        How did you detect it?. Its concerning that MS Security essentials didn't


          Re: Possible corrupt DBF table or dictionary?

          Martin, I am still cautious. I have a bad spot on the system hard drive, so I will likely rebuild that PC this weekend anyway.

          Ray, I found a file, Decrypt_Instructions.html & ....txt. Later the folks on site found the PC that was ground 0, which did have a pop-up message about paying.


            Re: Possible corrupt DBF table or dictionary?

            This is the same ol' cat and mouse game.
            Anti-virus by default is reactionary (they need to see the virus to defend against it).
            Once those new definitions are pushed to clients, the virus writer re-works their code.

            The obvious best solution is for end users to use some common sense and precautions
            before clicking on attachments or links in email.
   is a great site to test and share sql code