Mathcad

What is more correct - Mathcad or Maple (SMath) Mathcad Maple

Hi! I am experiencing an error that states: This variable is undefined, even though it is.What is the problem here?I am running Prime 8. /Frederik 

Hello everyone. I wanted to use the refprop database in Mathcad. I used the file of Nagimov: Link below:https://github.com/nagimov/refprop2mathcad I also have the REFPROP installed in MS Excell and it works. I have windows11 and Office 2019.  But the problem when trying to get some result in Mathcad. It says: The range value specified is invalid: I tried different values, but it doesn't want to calculate. Any advice would be helpful RegardsJacob 

Hello.I had an issue using the function (if) as shown below picture, can you help me to solve it?thank.  

Hey why do I get an error when I want to define values?I'm just learning the program 😞Any help appreciated!   

Hello...What I can use between both of these conditions inside the ( if function) as shown in the below picture and the attached file?or how I can use 2 conditions at the same time (by or & and command ) as per the excel sheet.thanks    

 We have Mathcad 15 files that we are trying to convert to Prime but there are locked features within Mathcad15 that won't allow us to convert. (We can't open the files in Mathcad15 to unlock them first, thus we have no way of converting these files). Please Advise.  

Is there a keyboard shortcut for degree celcius unit? Instead of go to unit and select the unit itself? Thank you!

Hi All. My students and I have been getting some entertaining results with the solver arrow for the example problem below. With the "new" and "legacy" symbolic solver the results are somewhat "brittle" almost on par with the picture you get when playing with the ariels of an old-style TV set.  The correct answer should be about 0.0265.   For example a common result popping up for the NEW solver is this one (but the letters after the % can differ).  Note also that you can get the "Red Box of Shame™️" with some versions (the type of error in this case is highlighted. When using the legacy solver it can be more likely to behave and give the correct answer.  It also sometimes will give the correct answer but add a very negligible imaginary component.   Ideas her are welcome and PTC probably should give a prize for the most bizarre answer anyone can muster with this problem. Cheers and Thanks Bill Capehart SD Mines

Mathcad 15 does not make assumptions in very simple problem for find function and keyword solve to provide only positive results .  

Trying out MP 9 by solving a diff equation symbolical and got this ambiguous result- but it evaluate correctly:Owe   

Hi, Want to thank the PTC Prime team.  PTC do listen and fix things.  This only effects people with the Ryzen chipsets instead of Intel.   In Prime 8 any use of the matrix functions that use the intel math kernel (IMK) for matrix manipulation like Cholesky, QR, LU, eigenvals, eigenvecs, simple inversion would instantly crash the v8 program if you were on a Ryzen chipset.   PTC have listened and fixed it for Prime 9.0.0.0.   Thank you.   Cheers Terry

Help me.

Has anyone experienced this problem where NaN results appear and disappear for no obvious or repeatable reason ?  This is not a one-off event and appears to happen when working with large worksheets.  It happened a lot with Prime8 and it appears Prime9 is prone to the same issue.  On recalculating the worksheet and changing nothing, I get:If no one else has seen this issue then it might be a problem with my machine - although, I have checked the memory without finding any issues. Thanks GeoffD 

I congratulate all users of the mathematical (physical and mathematical) package Mathcad on the day of mathematics

Hello, my computer crashed last Night and ive been having trouble opening my mathcad file. I think it got corrupted. Any idea you Guys can fix it?

I have authority to buy a software but I don't have authority to buy subscription so if I buy a subscription based software then it is a mess for me every year to renew. For reference apparently Matlab is available in perpetual for around $2K How to buy perpetual license?    

Hi Guys, need your help!. I am trying to create a spreadsheet in mathcad to calculate shaft. So far, I've been able to create shear and moment diagrams for the kength of the shaft using singularity functions. Now, I am stucked in deflections and slope. I am considering Castigliano's theorem to do it without success.... Castigliano's theorem uses a Heaviside Function and dummy loads at any point on the length of the beam/shaft... First, I defined the heaviside function and then put into the moment equation but then I couldnt do the partial derivate of this equation with respect  the dummy load Q, so I had to do it manually (this way the spreadsheet is no longer parametric and will create errors if I change some inputs values). Then when having all the equations to go for integration, it seems that something is undefined..    do you think there is a fancy way to do this?. At this point I am bit frustraded I don't know where the problem is.. Another thing is,

Hello everyone!I have been using MATHCAD for decades, and since 2015 I have been working hard on MATHCAD 15 which I am enthusiastic about and continue to use. In view of a crash of the more than ten years old system on which it is installed, I tried to install MATHCAD 15 on a new machine, using the version stored on a pendrive. After installation and launch, it asks me for the license that I downloaded from the 2018 email attachment when I requested a new license. Unfortunately it is not recognized. How to overcome this obstacle? Thanks in advance for helping me.Greetings,    

hello.I want to use the simplified equation surrounded by the red line instead of the ( if function) , how i can make it work?thanks.

I have a legal 32 bit CD for Mathcad Prime 2 that I used for many years on my old laptop which had Windows 8 OS. Microsoft does not support Windows 8 anymore. So, I bought a new laptop which has Windows 11 OS, 64-bit machine. I also have legal 64 bit CD with Product Code for the Mathcad Prime 2. I installed it on my new laptop but having hard time getting the License Key. Therefore, I will appreciate if someone from the PTC or the PTC community could help get the License Key!      

hello. I am trying to make a combo box with multi choices of various equations depending on defined variables, the attached file will explain it very well.how can I make it work?thanks, 

In the attached Prime 8 file I'm trying to solve a problem I have invented in my head.  I have 2 metal plates, one is fixed and the other is moving toward the other very rapidly (e.g. 1000 mph).  The voltage between them varies sinusoidally at 60 Hz.  The air between the plates is assumed to breakdown at 3 kV/mm.   I want to vary the phase angle of the applied voltage and find the phase angle that results in the maximum voltage stress across the air in the gap.  But, I'm not sure how to find that maximum in MCAD.    

Using Mathcad 3.1 under Windows 10.  Mathcad refuses to plot a two-variable function even though it will plot the same one-variable function with the other variable fixed.  "Cannot plot this function. It must evaluate to real values."  What is going on?  (File attached) 

Can someone please explain how the right side (RHS) of the equation below represents active power (P)?                       Explain P: = PFUL*MVA + (MVA - PFUL*MVA) *i/N   given N = 2000, and I run from zero to N.