Starting with version 4.1.8, charts seem to vanish in the following scenario.
I see that too. I did some research, and found that the OS/2 version fails to save the chart. If I do exactly the same thing in windows AOO 4.1.8, it does what it is supposed to do. I can then open the sheet in OS/2, and the chart is there. If I then close, with save, and open it again, it is gone. Actually that isn't quite right, because there is a small blank spot where the chart should be. The chart is gone in windows too.
I haven't had the time to try to report this. I do remember reporting something a couple of years ago, and it took hours to work through the reporting procedure. FWIW, there is a report that describes the problem. It was dismissed as being an invalid chart setup (obviously wrong, but I haven't looked recently so there may be more).
Never thought about saving as .XLS. I will try that. At least it is a work around. Thanks...