The maximum number of selected progress lines has been exceeded.}There is a limit of 1,024 progress line dates that may be ...

{The maximum number of  selected progress lines has been exceeded.}There is a limit of 1,024 progress line dates that may be used at one time.

To create more progress lines, you must first delete existing progress line dates by going to the Format tab, click on Gridlines, and then click Progress Lines.