200 series but get "The maximum number of series per chart is 255" error message

Hi,

I run a large simulation experiment. I have a loop plotting data in excel of a user defined area. Because of the limit of 255 series I have allowed a maximum of 250 simulations (they all need to be plotted). But the length of each simulation is free. I know there is a limit of 32.000 data points in a graph and I have this as a condition too.

If I set the data range to 100 columns and 3000 rows the graph is produced when I plot by columns. (code below)

But if I set the data range to 250 columns and 1000 rows I get the above mentioned error message. Even though I only have 250 series.

After the data is plotted it is the code below that gets the error:

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Help is appreciated. Thanks