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Linked Reports - External Field Calculation

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    Linked Reports - External Field Calculation

    Need some help with this. I have a parent report with a child report and have a total in each report. I have selected the child report total as an external field and placed it on the parent report. So far so good but then when I create a new calculated field to subtract the child total from the parent total I get an invalid or incomplete expression. The parent field is called Count which seems to work OK but maybe could have been named better. Does anybody have any thoughts as to what I have done wrong?
    Attached Files

    #2
    Re: Linked Reports - External Field Calculation

    Hi John,

    Sometimes I have found the message says "invalid or incomplete", but when used in the report it actually gives the correct result.
    Does anybody have any thoughts as to what I have done wrong?
    Sorry not much help from me at this time.
    Regards
    Keith Hubert
    Alpha Guild Member
    London.
    KHDB Management Systems
    Skype = keith.hubert


    For your day-to-day Needs, you Need an Alpha Database!

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      #3
      Re: Linked Reports - External Field Calculation

      Thanks, Keith but when it says "invalid or incomplete" it really means it.

      Comment


        #4
        Re: Linked Reports - External Field Calculation

        As count is also an Alpha function, I would try renaming that as the first guess.

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          #5
          Re: Linked Reports - External Field Calculation

          Thanks, Lance. Renamed the field but still doesn't work. When I look at selecting a calculated field for the expression I can see that the Type is U when it should be N. Any ideas as to how I can get it to be the correct field type?
          Attached Files

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            #6
            Re: Linked Reports - External Field Calculation

            Are you using layout table reports? If not, it maybe worth changing to them, because it is really simple to do in them. There is none of the TOPPARENT bit with them.

            Once you create your child report, link it in your parent report and in the child report editor you will see a external fields button, with an explain external fields link, which is really helpful. From there it is just like creating a total field in the child table, but it is fully accessible in the parent field, so you would define a calculated field something like total_moves = total(moves,GRP->Grand,GRP->detail) then use total_moves in your parent report.

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