Nobody (in their right minds) is going to open that. Forget using the converters, just go File > Save As and save in Excel for Office 2000 / 2003 XP format. If you want a chart to show up the same regardless of who's looking at it, export it as a graphic or use Acrobat to print it to a .pdf file. There's also the program I use, PDF Creator, which acts as your plain jane PDF maker:Thanks Matlab alot. I have converted the following file from .xlsx to .xls using an online converter... I am not sure if it is gonna be displayed correctly in the compatibility mode. Would someone please open this and tell me if you see the data and the stress vs. strain plot?