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Subtract Short Time ???

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    Subtract Short Time ???

    Hi Guys,

    I am trying to subtract a short time to find the number of minutes that has passed. I can�t seem to find the correct format and I�m not having much luck researching the message board.

    This works just fine:
    ? (toseconds("11:36:00 00 pm")-toseconds("10:48:00 00 pm"))/60
    = 48

    I need to pull these values from my browser window and then populate a numeric field with the minutes totaled.

    tbl.TTIMEEND = a5_eval_expression("=ctot(a5_TimeStamp())",local_variables())
    tbl.TTIMETOTALS = a5_eval_expression("=toseconds(\"Brwtechtime:Ttimeend.value\")-toseconds(\"Brwtechtime:Ttimestart.value\")",local_variables())

    Any suggestions?


    Re: Subtract Short Time ???

    Misread another one. Looking further.
    There can be only one.


      Re: Subtract Short Time ???


      What are your field types for TTimeStart & TTimeEnd?

      This works with out converting anything.
      start = "2:43 PM"
      end = a5_timestamp()
      = "02:50 PM"
      = 2100
      So your example would be:
      tbl.TTIMEEND = a5_TimeStamp()
      tbl.TTIMETOTALS = toseconds(Brwtechtime:Ttimeend.value)-toseconds(Brwtechtime:Ttimestart.value)
      Last edited by Scott Emerick; 03-01-2010, 03:58 PM.


        Re: Subtract Short Time ???

        If your fields are shorttime type you don't need any conversion either. Just use

        There can be only one.


          Re: Subtract Short Time ???

          Thanks Stan and Scott,

          The starttime and endtime fields are Short Time. The field with totals will be a number (numeric). I have included a picture of the table data.

          Thanks Again,



            Re: Subtract Short Time ???

            Hi Stan

            tbl.TTIMEEND = a5_eval_expression("=ctot(a5_TimeStamp())",local_variables())
            tbl.TTIMETOTALS = a5_eval_expression("=(Brwtechtime:Ttimeend.value)-(Brwtechtime:Ttimestart.value)",local_variables())

            I made the following changes through the Genie but I seem to have a value of 60 no matter what duration occurs.


              Re: Subtract Short Time ???

              I'm unclear when your script is executing. why not just make ttimetotals a calculated field?
              There can be only one.


                Re: Subtract Short Time ???

                I share Stan's confusion. Seems to me your script is sometimes talking to the table beneath the form and then in other places its trying to pull values from objects in the form layout itself. I find it best to avoid mixing code like that.


                  Re: Subtract Short Time ???


                  I feel really dumb at the moment. I don't know why I didn't think of that. I let you know how that works but great suggestion!


                    Re: Subtract Short Time ???

                    Nothing to say a script to populate the field isn't just as good. You gave it a shot.

                    No need to feel dumb when you make an honest effort.
                    There can be only one.


                      Re: Subtract Short Time ???

                      This was the code that provided me duration in minutes:

                      Thanks again for your help. Onward to my next puzzle.