I am using Apose.Cells for .NET (220.127.116.11). I have noticed with recent builds 18.104.22.168 and newer that the Save to PDF functionality is generating plot lines for data that goes outside the range of the axes/gridlines. There is also some strange straight lines that get drawn when this occurs. This was not the case with previous builds (e.g. 22.214.171.124). I have attached a sample Excel file and resulting PDF which demonstrates the issue.
Thanks for your posting.
This issue has been logged as CELLSNET-27240.
Please download Aspose.Cells
for .NET v126.96.36.199. We have fixed this issue.