Hello Quentin,
Thank you for your inquiry.
I used saveChartAsImage() to test the Excel file you provided, but didn't find the behavior you mentioned. According to your description, you use our Spire.Office to create a chart and then save the chart as a picture, right? To help us further investigate your issue, please provide the following information. You could attach them here or send them to us via email (
support@e-iceblue.com). Thanks in advance.
1) Your complete test code.
2) Your test environment, such as OS info (E.g. Windows 7, 64-bit) and region setting (E.g. China, Chinese).
Sincerely,
Annika
E-iceblue support team