@wswain In the popup dialog, you can:
1) "upload" the file
2) ""insert link"
3) close using the "OK" button

If you used ImportMatrix from a csv file (as the tags suggest) then your Matrix accidentally have some nonnumeric entries.

But you have not attached any actual data file, or a worksheet that shows how you imported it, so we cannot tell what might be wrong.

You can use the green up-arrow in the Mapleprimes editor, to upload and attach files here. You could put data files such as .csv into a .zip file and upload that.

@Kitonum What about making h be a function of 4.0 and the number of frames? Do you want to avoid overlaps or gaps? Perhaps your h=0.15 was intended as h=4.0/60=1.0/15=0.066... instead?

As given (with h=0.15 and frames=60 and the range of x) I don't see how the overlap could be ok, since the total volumes of the shells/washers is high.

It might also be nice to allow a midpoint/low/high choice.

[edit] Here is an attachment showing that using option grid=[2,49] (for the plot3d constructions of the 3D extruded annulus) saves about 60% of the size of these animations. This also improves GUI responsiveness while playing. annulus_grid.mw

@Anthrazit I see, thanks. You may well have good reasons for wanting to use tables as the data structures, further down the line. And if using trunc gets you the conversion you want then great.

If your example is just a downsized sample, and you'll actually have much larger examples then you want to consider refactoring some of that processing code so that it scales up with good performance. Much of it could be done with a few passes through the data, eg. more efficiently using seq rather than repeatedly building up sets, etc.

@mikerostructure I was trying to ask about whether the problematic machine had recently undergone an OS update where before it worked and after it didn't. (I wasn't asking about all recent updates where behavior remained the same, or whether any update done now would affect it.)

Sorry, I don't understand what you are saying about a colleague's machine. Are you saying that he too can (as of recently) no longer right-click export even simple plot3d examples from either Maple 2019.2 or Maple 2020.0? Or are you describing mixed circumstances and results, using various examples. It's not clear to me what you are describing, sorry.

What operating system are you using? Any chance that it got a recent update?

You have omitted showing us any proper example of your current process of reading the external data file and importing it into a Maple data structure.

It should be clear that (evan a small) representative example of your actual current process and data would properly help in providing a sensible commentary on how you might proceed.

Who has changed and corrupted two questions by the member?

It is not helpful or constructive to omit any examples which show what has happened unexpectedly, and side comments to describe what you wanted.

So far, we don't know precisely what you did. We don't even know whether you were acting within a procedure, or at the top-level, or making using of lexical scoping, or passing arguments in procedure calls, or some mix of those, etc.

Stop submitting duplicate question threads for this.

Stop submitting duplicate question threads for this.

Stop submitting multiple Question threads that relate to your trying to get started on this platform.

Stop submitting multiple Question threads that relate to your trying to get started on this platform.

@RohanKarthik As I mentioned in my Answer, tou can enter and execute plaintext 1D Maple Notation code within an Execution Group or a Code Edit Region.

For example -- even within a Document -- you can obtain either of those from the "Insert" drop-menu from Maple's main menubar.

From a Worksheet one has Execution Groups as a the default mechanism for entering and executing code. The F5 key toggles between 1D and 2D input modes (as do Ctl-m and Ctl-r respectively)

This is all documented in the Help system. Start with the Help Topics,
    worksheet,documenting
    worksheet,documenting,executiongroups
    worksheet,documenting,2DMath

The platform (Windows, OS X, Unix, Linux) is not relevant to your question.

What may be relevant is the number of the "old" version, and the particular .m file. You didn't bother to provide either.