Mathcad

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

I'm trying to open old Mathcad files that have the extension formats xmcdz, xmcd, and mcd. However your current version of Mathcad Express Prime 9.0.0.0 doesn't seem to be able to open these old formats. What do I need to do to be able to open and convert these old files into the new version.Your assistance is much appreciated.

Issue: Error "Conversion failed. Could not start Mathcad conversion process" while converting legacy Mathcad worksheets in Mathcad Prime OR Mathcad Prime with parallel installed Mathcad 15.0 does not convert .xmcd files to .mcdx with error message:Mathcad conversion process could not be started.     Resolution: There are two options to resolve this issue:   Option I: Find Mathcad Prime shortcut on desktop > right mouse click > Properties Select Compatibility tab Under Privilege Level section check option check Run this program as an administrator Apply > OK Option II: Click Start > Programs > Administrative Tools > Component Services Under Component Services, select Computers > My Computer > DCOM Config Select Mathcad, right-click, then select Properties Select the Security tab Click #Edit under #Access Permissions Select the System User and allow Remote Access rights

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?

My PC was hacked and I had to rebuild it.I was trying to reinstall the free user version and it tells me the number of licenses has been exceeded.I am retired and I love to solve problems using this tool. I have been a user for a lot of years before I retired.

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, trying to install version Mathcad 8.0 but if double klick the setup.exe file it shows that something is loading, but at the end nothing happens. Then tried to install from the .msi file, it downloads some tools but at the end it doesn't work either. Funny things is that the Mathcad 7.0 Version Installation works.So whats the problem? idk

REQUEST TO GET LICENSE KEY FOR MATCHCAD PRIME 2.0

I had problems with the setup crashing because kernelbase.dll as I found out in the Manage My computer My path/username contains the Swedish letter 'ö' :  ...but when I moved the extracted install-zip for MathcadPrime 9 directly to c:\ and tried to install it worked fine!Setup now runs smoothly. So be aware of any local charachters in the installation-path!  

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.        

Is PTC planning to offer in future versions of Prime backward compatibility with files created with Matcad 15?     

Good afternoonI`ve received License file on my email but I don`t understand how to apply it. When I use .dat file for activate nothing happens. I still see "29 days left".How fix it?

In attached file I'm trying to plot a function of time but am getting a "Replace complex values and NaNs by real numbers".  If I include units in my "t" range definition I can plot my second function.  If I exclude units I can plot my first function.  But not both at same time.  I can't see what is wrong.   

HiI get an error in the root function when a variable exceeds a specific number. See attached file.  Thanks in advance      

For x,y kind of dataset, it is required to perform numerical integration w.r.t. x'.The italiczied P represents Cauchy's Principal Value. Limits are from 0 to infinity.It was first tried to approximate the x,y data by combination of mathematical functions but didnot succeed as the data can not be modeled so easily and exactly.Apologies for not putting very clear image. I do not find any clue how to proceed on it. Thanks. 

I am analyzing a ground motion applied to a SDOF structure and finding the motion with Newmark's method. To accomplish this I have read the ground motion in with the readexcel function and then use a for loop to find the relative displacement, acceleration and velocity for each time step. The file used and the needed excel file are attached.