Hi.

I think there are some problems in version 3391. For example, the code snippet below works without any problems. But sometimes this line gives errors. A code that works continuously with a timer. But sometimes it gives the error below. I bypassed the error with Try-Catch and it works properly again in the following runs.

In another part of the application, the value I assigned to the long variable is set to -2147483648 when the data window is set. This value is the lowest limit of the long variable. Most probably there is a problem with the long variable in version 3391. Somehow the long variable turns into the lowest value and naturally the problem I first mentioned above occurs.

Error : Invalid DataWindow row/column specified at line 134 in function of_portcheck of object n_network.

Datawindow columns

**** Script ****

long i, k

datetime ldt_logdate

datastore dw_port

....

...

For i = dw_port.RowCount() to 1 step -1
    ldt_logdate = dw_port.GetItemDateTime(i,"logdate")
    if ldt_logdate < ldt_olddate Then
        dw_port.DeleteRow(i)
    else
        For k = 2 to 4
            ll_ping[k] = dw_port.GetItemNumber(i,"ping"+string(k + 31399))
        Next

...

...

...