line chart type number for VB

i have macro for line chart and getting markers on chart. how can i get thin line without any markers dots on it?
any idea?
thanks.

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Now to your question:
You may add the following lines in your code to remove the markers.

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It should work. Did you place the suggested For Loop just below the line which says End With? And place the line Dim ser As Series in the declaration section.
What do you mean by Excel is not responding? Does the application freeze?

Does that mean, excel doesn't freeze if your original code creates all the charts and it freezes when you add the suggested code to remove the markers?
Can you upload a workbook in question?