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Hello Maple

I am preparing for an examination in Calculus, but my worksheet in Maple 18 doesn't cooperate. 

A lot of my studypartners use Maple 16 and they have no problems. 

I meet the following error: 

- Error, (in solve) invalid input: hastype expects 2 arguments, but received 1

I'm totally sure, that I'm typing correctly, because I write just the same as my studypartners. 
So is it an error, which only is seen in Maple 18 and can I do anything to solve the problem?

Kind regards
Anders Kristensen

PS: I can't figure out how to add a picture

I've got a worksheet in which I have invested many hours of CPU execution time and if the computer goes down, or Maple fails for some reason, I'll lose it all.

If this happens I would like to be able to continue the calculation from where I left off.

By saving the worksheet periodically, I can save all the commands, but not the results, so if I have to restart, I'll have to wait many hours before the worksheet catches up to where it left off.

In ancient versions of Maple, you used to be able to save an executed worksheet including results (I sort of remember that you wrote a file with the extension ".M")  but the new help pages say that is now different from what it used to be. Obviously I can "save" individual symbols to a file, but for a complicated worksheet  that gets complicated.

I've read about "maplet" files, but that doesn't seem to fill the bill either.

So, is there any simple way to save a worksheet so you can continue seamlessly from where you left off after a crash, with all the previous results intact?

I use maple worksheet to organize a derivation, etc.

But most of the paragraphs and subparagraphs should normally be closed.


But after executing the file (using !!!) every paragraph is opened.   

We need better ability to control the opening/closing of paragraphs.


How do I close ALL paragraphs.


Also, how do I close all TOP level paragraphs (but not subparagraphs).


Thanks, Chee


Does anyone in the community know example worksheets that analyze "billiards", viz. trajectory sets of free, specularly reflected particles constrained to bounce around in a particular 2d domain?

Are there any examples using the Bunimovich Stadium Billiard?


Bob Terry

For different reasons I need to ocasionally export a number of Maple worksheet in a folder to pdf files. Is there a way to automate this? I would want that the worksheet is opened, output removed, then executed and eventually exported to pdf. It can take quite a while to do this manually for about 50 worksheets.

Hi, I've written some matrix computation in maple 18 . I wanna open this file in maple 16 ? how is it possible ? any help is appreciated in advance.

When I open my file I got an error message says "there were problems during loading process"

and some of my text are missing.

Maple Worksheet - Error



Can anyone help me,please

how to access the variable which is currently running in another worksheet

to use for loop to read the Table

when worksheet is evaluating for a very long time, 

expect to read the value Table T in anther worksheet



for i from 1 to nops(polylistresult) do

if i < j then
for j from 1 to nops(polylistresult) do
for k from 1 to nops(polylistresult) do

if j < k then

F := [polylistresult[i], polylistresult[j], polylistresult[k]];
h := function1(F, {x, y, z}, s);
T[h] := [op(T[h]), F];

end if:

end if:

worksheet2 :

for i in indices(T) do

Dear all

I want your help in a problem.I want to substitute in a summarization ,the variables for Vi and ξi.Because the number of variables are more than 200 I want to know if there is a way to take them from the excel sheet and put the to my program.attached are the maple worksheet and the variables table

P.s. i have done it for 44 variables

Attached is my sheet.

On my system if just execute the whole worksheet maple return the last statement's integral un evaluated, however at this point if re-execute the statements from the definition of L2, it looks that maple has evaluated the last statement's integral.


What am I missing here, any help?


Phil Yasskin (Texas A&M) has prepared a maplet for the Maplets for Calculus proiect. While this maplet works, in Malmem 18 it sometimes does NOT display the plot. We don't see this behavior in Maple 17, The maplet is attached for your convenience, if you are interested in seeing if it works for you.

The problem is difficult to describe. Basically, at the end of the problem, users can elect to see a plot of the function with(some) asymptotes. The code creates the plot when the problem is created, and displays this plot in the worksheet. But, when the plot is requested within the mapmlet, it sometimes does not show in the empty plot window.

Any explanations (or followup quesitons) will be greatly appreciated.


Douglas B. Meade  <><
Math, USC, Columbia, SC 29208  E-mail:
Phone:  (803) 777-6183         URL:

Hi Maple friends.

I have a plot. I click on the plot, and the blue border appears the around the plot. I press the delete key on my keyboard, and the plot is not deleted. Not deleted when I press the backspace key either. I can right-click on the plot and choose 'cut', but that just copies the plot to the clipboard.

So how can I delete a plot from the worksheet, without deleting anything else?

Thanks in advance.

Is there a way to open a classic worksheet in macintosh, even running windows through a virtual machine?

Hi there

I'm working with maple 13 (2d input) and I would like to hide the input in a worksheet, as follows:

view > show/hide contents > (unchecking) input

however i want to insert comments as text that will remain in my worksheet. Using '#' doesn't help, coz they get hidden too.

Couldn't sort out how to do this, any tips?


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