×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

*
*
*
*

Thanks. We have received your request and will respond promptly.

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Inconsistent Re-Calc

thread552-294662

Inconsistent Re-Calc

Inconsistent Re-Calc

(OP)
I'm working in MathCad 14 and have found that once a workbook gets more than a few dozen equations, some of them will not refresh with a change in an input variable.

If I change an equation, the answer shows up recalculated as soon as I hit enter, but for complex sheets I find that most of the time the equations don't recalculate and I have to step through them one at a time hitting F9.

Any ideas on a parameter that might be controlling this?

Before anyone asks: yes, I do have automatic calculation turned on.

David

RE: Inconsistent Re-Calc

(OP)
Sometimes, but I was working on one (doing a sort of goal seak with 50 intermediate steps) where I just put the boudaries of an "area" over the intermediate steps and could change a number and see that the answer didn't change.  I'd go to the bottom of the screen and hit F9 to get it to update.  When I un-hid the area I saw that a bunch of equations had recalculated, but a bunch hadn't.

David

RE: Inconsistent Re-Calc

I have noticed this with Ver. 13 as well.  I don't have a solution.

RE: Inconsistent Re-Calc

There's a bug with inline evaluation, if you have statements such as the following:

a:=2
b:=3
c:=a+b=

The displayed value of c will not change if you change the value of a or b (the stored value does change, so future calcs using c are correct).  One way around it is not to use inline evaluation, the other is to use ctrl-F9 to recalculate the entire worksheet.

Peter
 

RE: Inconsistent Re-Calc

(OP)
pstucky,
That is exactly what I'm doing.  And come to think of it, on the intermediate calcs that I talked about above it is a mix of inline calcs/display and just display so it makes sense that the inline ones would not show a re-calc but the others would.

Thanks

David

RE: Inconsistent Re-Calc

if you want recalculate you must display each value in an other comand
you can send a exemple who you consider it doesnt work
and i will help

RE: Inconsistent Re-Calc

(OP)
Pstuckey's solution works perfectly


z=a+b=5

will not display a new value if I change a or b

z=a=b
z=5

will display a new value everytime I change a or b.

David

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login

Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now
Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close