Dialogue box while opening xlsm file

[masud8956]

Hi,
In my xlsm workbook:
1. I have list of participants and their progress charts.
2. It also has sheets where I have date stampings through macro.
3. I have used formulas in multiple sheets that are compatible to Excel 2010 and above.
4. There are multiple charts that I have used.
5. All sheets are locked with password.
6. Macro is locked with same password.
7. I have not used any external link.

But when users trying to open the file from their computers, the following message appears though the file runs alright:

What could be the possible reason for this? How do I fix it?
I cannot find anomalies in terms of cell ref, named ranges and there is no external links.

Thanks.

 

[RoryA]

Assuming you have verified that there actually aren't any external links, I'd start by checking the chart data sources.