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Hi
I'm trying to reference a field in the previous row using {[Index]-1} but I get the error:
"We cannot convert the value to type list".
Please see the screen-shots below that explain what I'm doing.
Your assistance will be greatly appreciated.
Thanks, Mark.
(1) The code with the {[Index]-1}
(2) The "Index" column.
(3) The errors I get in the column.
(4) The error description.
Solved! Go to Solution.
In the first formula you are refering to the field [Margin], which refers to the value in the current row, but you want to refer to the entire table column, so [Margin] must be preceded by the previous step name.
Otherwise, this kind of references tend to be very inefficient, so if you have a large table, the refresh will take "forever".
A far better solution is to get the data from the previous row on the current row, as I explained in this topic.
In the first formula you are refering to the field [Margin], which refers to the value in the current row, but you want to refer to the entire table column, so [Margin] must be preceded by the previous step name.
Otherwise, this kind of references tend to be very inefficient, so if you have a large table, the refresh will take "forever".
A far better solution is to get the data from the previous row on the current row, as I explained in this topic.
Hi Marcel
Thanks for pointing me in the right direction and taking me away from going down the path of using {[Index]-1}.
I tried out that option ans as you pointed out, it results in a very long query execution time (I just killed the process after it had taken way to long already).
I actually already had the 2 indexes and had done the merge, so thinking about it I used groupings to solve my problem of summing the [Margin] column.
Many thanks for assisting and best regards, Mark.
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