Disk full while accessing ...

May 31, 2017, 1:18 am

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Hi everyone,

I have a strange problem that I am not able to identify. It is a system problem, not a technical question about Mathcad.

Nevertheless maybe someone has experienced this and can help.  I have already re-booted my PC.

It happens in Mathcad 15, not in Prime.  When I try to save, I get:

my Disk E: is not full!

If I save on Desktop and then move the file to the target directory, it will be saved there ok.

The problem happens now for many Mathcad files in that directory (but not for all).

thanks for any hints

Regards

Claudio

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Question of returning the correct bandwidth information of a bode plot

June 2, 2017, 11:31 am

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Hi all, I have a nonlinear function whose bode plot have multiple crossing of the 0dB line. I want to return the first zero crossing point from the bode plot as the bandwidth information, would anyone help me about this? The method I used to do only works for the function with only one zero crossing point. But it get some problems in this multiple-zero-crossing cases. Thank you!

Need help understanding Syntax of linfit function?

June 8, 2017, 6:49 am

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Dear Community:

 

I am a very new user of MathCad, and I need help understanding the syntax of the linfit function.  (At least I think it's a syntax issue).

 

I built a small worksheet to look at various curve fitting functions (it grew out of a need from a work related worksheet; I have hand entered some of the data and changed to units to make the example sheet self-contained).  I successfully parroted the linfit example for a quadratic fit (a*x^2+b*x+c), but I could not extend it successfully for a cubic fit (a*x^3+b*x^2+cx+d).  I could successfully build a cubic fit using polyc.

 

I enclose the worksheet:

 

Page 1: Data

Page 2: Cubic Spline

Page 3: Straight Line

Page 4: Quadratic linfit (and polyc)

Page 6: Cubic linfit (and polyc)         <---- This is where it goes wrong

 

Any insights would be appreciated.

 

Regards,

 

Bob

Solving two simple ordinary differential equations with odesolve. Why the second one fails?

June 9, 2017, 12:33 am

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Hi all!

Maybe I'm losing in a glass of water, but I can not solve the second differential equation with odesolve, in the problem hereunder exposed. What's wrong?

I don't know how to ask for help

June 9, 2017, 7:32 am

≫ Next: Bug in symbolics in combination with floating point numbers

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I run Mathcad 15 on a virtual Windows XP machine within my iMac Sierra. I have not used Mathcad for more than a month. when I came to use it this afternoon (9th June 2017) I could not start it up. Can anyone direct me to someone who might be able to help, e.g. a help department of PTC, please?

Bug in symbolics in combination with floating point numbers

June 11, 2017, 6:58 am

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Did we already discuss that kind of bug here?

And has anybody an idea what the reason for this strange errror (recursive definition) could be?

The error occurs when the frequency is negative and floating point,

 

Identifying coefficients, and storing them as variables

May 11, 2017, 4:46 pm

≫ Next: Hello; I'm trying to open a mathcad file that I've been working on for 2 weeks, but today the file does not open. Can anyone please help me? Thanks!!

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Hi,

 

I seem to have worn the internet thin, and have scoured posts here aswell and have not found what i'm looking for. i might have misset it, if so i apologice. Also, please excuse my english. 

 

So what i'm looking for is a way to have mathcad prime look at an equation and store coefficients as variables - maybe by comparing the equation to a "mask". please take a look at the attached file to see what i'm talking about.

 

Thank you in advance

 

/Tonni

Hello; I'm trying to open a mathcad file that I've been working on for 2 weeks, but today the file does not open. Can anyone please help me? Thanks!!

June 10, 2017, 1:23 pm

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This is the displayed message:

 

The file type is not supported. Log file is located at C:\ProgramData\PTEc\MathcadPrime\Logs\MathcadPrime_Exception_20170610_125046.log

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msxml6.dll is either not designed to run in windows or it contains an error

June 12, 2017, 2:38 pm

≫ Next: Returning multiple variables from a while loop

≪ Previous: Hello; I'm trying to open a mathcad file that I've been working on for 2 weeks, but today the file does not open. Can anyone please help me? Thanks!!

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msxml6.dll is either not designed to run in windows or it contains an error.

 

 

what does this error mean, how can it be resolved ???

Returning multiple variables from a while loop

June 12, 2017, 7:59 pm

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Hi,

I have been trying to get a while loop to augment multiple matrices, previously defined globally,  until convergence is reached. I then want to access these matrices outside of the loop to perform further calculations. I have been having no luck, and am not even sure if I have defined the loop correctly to draw from the global variables. If you have any ideas, i would be incredibly appreciative.
Thanks so much,

Solve-Block-Solution: non linear EQN-System

June 12, 2017, 11:16 am

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Hi!

 

Maybe today it is much too hot and I have drunk too little water and coffee, but i can't find a stable solution for a defined problem:

 

I have to solve a mechanical problem (dimensioning steel cables) with the solve block including 18 equations with 18 unknowns:

It is required that the lengthchange, the number of threads and all forces, etc. are calculated with the solver.

Please see the sketch (you can doubleclick the .exe file to view it, it's an e-drawing file) and worksheet in attach.

The Problem is: I have as many equations as unknowns and when i change the guess values, i get always different results.

Are my equations right, and do i define something double or contradictory?

Any help will be appreciated.

Thank you very much for your efforts.

Volker

Questions about Excel table length, page number, and height of header

June 13, 2017, 12:13 am

≫ Next: Mathcad 4.0 Loses Pagination

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Hello guys, I have a few question about general functions of MathCAD:

 

1. I found that when using Excel Component, the whole length of Excel table has a specific upper-bound (about 1.5 times of an A4 page). If I extend the length size over this limit, the words in the cells will be deformed and the displaying rows may not increase. This issue makes me unable to show a length Excel table in once, I have to separate the table to multiple Excel components.

 

2. How can I access the page number and chapter title to automatically generate a table content like in MS Word?

 

3. The height of Header and Footer are fixed, I can't add more tables/pictures/words under the default height.

 

Are there any solution about these issues?

Thanks!!

Mathcad 4.0 Loses Pagination

June 12, 2017, 11:04 pm

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G'day,

There seems to be a bug in Mathcad 4.0 where it just loses pagination and things creep above the page break line.

I've spent about an hour trying to fix a many page document only to hit save and they randomly creep up again.

Is there a solution for this?

 

Thanks,

 

Wade

Linterp Problem

June 13, 2017, 11:53 pm

≫ Next: Mathcad 15 M050 Release?

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I have one Mathcad worksheet for interpolation.  It works fine on a set of sparse data in the DATA 1.xls file, but the interpolation fails for the more dense data in the DATA 2.xls file.  I don't think I have any duplicate data points; however, it indicates that one of the arrays in the interpolation is not in ascending order for the more dense data.  I cannot find any errors in the data.  Here is an image of the error message.  The two Mathcad 15 worksheets are attached along with the data files (one for each Mathcad sheet): one for the sparse data and one for the more dense data that produces an error.  I don't understand why it works for one set of data and not the other when the only difference is the number of data points.  Any suggestions.

 

Mathcad 15 M050 Release?

June 13, 2017, 12:34 pm

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The Mathcad 15 M050 release that supports Windows 10 was supposed to be 2nd quarter of 2017 according to the Roadmap.  Has anyone heard anything at the PTC events on when this is actually supposed to hit the street?

 

Thanks,

Jeff

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Can't find "data_files.zip" file for use in tutorials

June 13, 2017, 8:52 pm

≫ Next: Mathcad 15 Excel Component - invalid cell range?

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Just downloaded the free trial of PTC Mathcad 4.

The tutorial asks to download the "data_files..zip" file.

I can't find it on the PTC web page.

 

Can anyone tell where/how I can find and download the data fiel?

 

Thanks,

Mathcad 15 Excel Component - invalid cell range?

June 15, 2017, 11:04 am

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In the attached Mathcad 15 work sheet an Excel component spreadsheet has been inserted.  The spread sheet has a Visual Basic program that uses input from cells on sheet1 and outputs a result in cell E11.  Mathcad is to calculate the input variables and assign them to cells E4 to E9.  Then Mathcad is to read the result from Excel in cell E11 for use in the remainder of the Mathcad worksheet.

The problem is it doesn't work.  Mathcad presents an error message that says "invalid cell ranges" and then locks up Mathcad.  The spreadsheet outside of Mathcad works perfectly?

Is there something wrong with the way I'm trying to integrate the two programs?  Is there something wrong with the cell references?

I didn't write the VBA program in the Excel worksheet.  It may be simpler to convert the program to a Mathcad program but I'm not conversant with VBA programming to do this.  Would appreciate help it the problem above can't be fixed.

The lookup routines should be direct to the Wbeam excel file.

Thanks,

John R

How to Extract Elements of a Nested Array

June 15, 2017, 12:48 pm

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I am having trouble extracting elements of a nested array (that is the output of a program) for plotting. The bottom of the attached worksheet explains in more detail what I am trying to do.

Prime 2 on Windows 10 ??

June 16, 2017, 1:09 pm

≫ Next: ln(100 m), e^(3kg) etc

≪ Previous: How to Extract Elements of a Nested Array

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recently upgraded from Win7 to Win10.  Prime 2 installed and activated fine.  after opening a new sheet.  i get an error for any function i create.

even in the expression "x:=5" gives the error "this variable is undefined..."

see attached.

 

maybe a setting somewhere??

ln(100 m), e^(3kg) etc

June 17, 2017, 6:43 am

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One question!

Can we get answer here ln(100m)=  ?

Yes, if we have ln(100m)-ln(1m)=

How  see please ln(100m/10m)=...

 

Second question!

Can we get answer here e^(100m)=  ?

Yes, if we have ....

What is it ...?