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Pack Table Script Error

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    Pack Table Script Error

    I'm trying to set up an operation to pack all the tables in a database. I copied some code from somewhere and am getting an error message for the following line:

    dbString = a5.Get_Path() + "\\" + table_name + ".dbf"

    The error reads: "Extra characters at end of expression"

    When I remove the "\\" the error message goes away but the script can't find the table when run. Being new to xBasic I'm not sure why a double backslash is used. I would think a single one would be used to designate a directory path.

    Any help with setting up a script to pack all tables would be appreciated.

    #2
    RE: Pack Table Script Error

    Try this

    dbString = a5.Get_Path() + chr(92) + table_name + ".dbf"

    Chr(92) is the ascii Value for the backslash. Alpha uses the backslash in a script as a continuation character so that a single line of code can be broken and shown on two lines for easier viewing. For example, both of these lines evaluate the same

    dbString = a5.Get_Path() + chr(92) + table_name + ".dbf"

    and

    dbString = a5.Get_Path() + chr(92) + table_name +\
    ".dbf"


    Therefore, when you need the backslash in a path in a script, it is easiest to use the ascii value. There are other ways, but this is the easiest.

    Jerry

    Comment


      #3
      RE: Pack Table Script Error

      Thanks for the suggestion Jerry.

      Using chr(92)eliminates the error in that line but the corrent path to the table is still not being set. I get an error in the very next line when I run the script:

      IF table.in_use(dbString) THEN ('Table not found' error)

      I've attached the script. You should be able to use this script with any database.

      Charles :)

      Comment


        #4
        RE: Pack Table Script Error

        Charles,

        Table.in_use() is not a valid xbasic function. Attached is a text file with different code. Since a table must be opened in exclusive mode, the code checks if it can be opened exclusively. If it can, it locks the table and packs. If not, then it gives the error messaqge and moves to the next table.

        Jerry

        Comment


          #5
          RE: Pack Table Script Error

          Thanks Jerry!

          Your script seems to do the job.

          I actually borrowed the pack script from an Alpha V version five application. Perhaps the 'table.in_use()' is a new function that v.4.5 doesn't recognize.

          Thanks again for your help!

          Charles :)

          Comment


            #6
            RE: Pack Table Script Error

            'Borrowing' things from Vers. 5, and then trying them with Vers. 4 is a risky business and is not recommended. Vers. 5, for example, includes built in database backup and restore functionality, that is not included in Vers. 4. Scripts that work with Vers. 5 are not necessarily going to work with Vers. 4 -- tom

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