Inconsistent Re-Calc 1

zdas04 · Mar 17, 2011

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

IRstuff · Mar 17, 2011

Are the unrecalculated expressions off-screen?

TTFN

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zdas04 · Mar 17, 2011

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

jghrist · Mar 17, 2011

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

pstuckey · Mar 18, 2011

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

zdas04 · Mar 18, 2011

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

Spiry · Mar 22, 2011

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

zdas04 · Mar 22, 2011

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

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Inconsistent Re-Calc 1

zdas04

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IRstuff

Aerospace

zdas04

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jghrist

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pstuckey

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Spiry

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