@Feenix Running Maple as root is unnecessary and not recommended. If you are running it from an ordinary user account, you probably don't have read access to root's home directory /root.

If that's not the reason, please post the error message, which is missing in your posts so far.

@Markiyan Hirnyk Yes, I've seen that it's incomplete. He asked a valid question on obtaining the equations of the spiral (possibly with the help of Maple) and an animation. There's nothing wrong with that.

@Markiyan Hirnyk Brian's question is well placed on MaplePrimes. See its "About" link: "[...] as well as general interest topics in math and computing". In addition, he uploaded a Maple worksheet - even though it's work in progress.

@Prashanth I was able to reproduce the problem (on Windows and Linux), and the feature was  certainly not removed intentionally. So please submit an SCR via the "More..." menu of MaplePrimes. If you prefer, I can also submit it internally.

Thanks for bringing the problem to our attention!

On Linux (and OS X, as Mac Dude pointed out), you can use plotsetup(x11) instead, but the Eclipse screenshot looks like you're running Windows...

1) no, just for visual clarity (to distinguish execution groups from each other)

2) View > Show/Hide Contents > Execution Group Boundaries

This term can also be found in Maple's glossary (enter ?glossary).

@bauerm The details provided so far are insufficient to pinpoint the problem. You can send that long code or worksheet to de_support@maplesoft.com, and we will take a look. No guarantees, however. Please specify your exact Linux version and some hardware specs (memory size, number of CPU cores particularly). Also, make sure you installed the last update 18.02 from here.

It's just the way you constructed the output. If you want formatted output, use printf instead; something like

for i from 0 to 3 do printf("rawData[%d] = new double[] { %f, %f };\n", i, hello(i+1), data[i+1]) end do;

Probably it's easier to use the CodeGeneration package. Note that it has been extended a lot since Maple 15, supporting 10 target languages by now.

@MDD Essentially yes, but you could also put it into your personal initialization file which is being read upon every start / restart (command or button). Under Unix (Linux, Mac OS X) it's ~/.mapleinit, whereas under Windows, it's maple.ini in your home directory. Note that this file does not exist by default, so you have to create it (typically with a text editor).

@brian bovril It's working well for me (on Windows 7). What windows version are you running?

A pitfall on Windows is that by default file extensions are hidden. So if you named your file maple.ini, Windows may in fact be treating as maple.ini.txt. Check your settings at Windows Explorer > Organize > Folder and search options > View > Hide extensions for known file types (or similar, may depend on exact Windows version).

Also make sure you installed the last update Maple 18.02 from here.

What does kernelopts(homedir) emit?

@Bendesarts Please check the rightmost button of the 3D window in construct mode. Its tooltip says "In construct mode, do not enforce kinematic constraints on selected components". Does that help?

By the way, MapleSim 2015 (released yesterday) offers some enhanced diagnostic features, like model comparison. See http://www.maplesoft.com/products/maplesim/new/ for more details.

@Bendesarts Your last statement is unclear to me. Does it work now (again)? If not, please specify what you are seeing instead. Maybe upload a screenshot.

@reinhardsiegfried Sure, just like most other options:

plots[animate](plot,[[k*x,k*x^2,k*x^3], x=-1..1, legend=["k*x","k*x^2","k*x^3"]], k=0...1);

@Markiyan Hirnyk Bad luck, but it was worth a try. :-)

@Kitonum Please see the screenshot. I think you missed the minus signs of two BesselI entries. Also, it seems that the O.P. entered a space between Bessel and Y (or K, resp.) in two cases where the output is italicized (slanted).

I made a short test with the upper left 2x2 block, and simplify(...,wronskian) succeeds. But let's wait for his original input to be sure.

In any case, he didn't ask for numerical evaluation, and a simplified exact result is undoubtedly interesting.

@Kitonum I agree with the interpretation of f and U, but my guess is that the O.P. is looking for an animation such as

plots[animate](plot,[U(t,x),x=-40..20],t=0..25,size=[800,300]);

[Note that the size option was introduced in Maple 18, but it's not essential here.]