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ELSID1-Visitor
1-Visitor
February 11, 2010
Question

Possible Solve Bug

  • February 11, 2010
  • 3 replies
  • 1484 views
Can someone verify this. I had a perfectly working sheet last month. I went in to do some text edits. When I re-saved, I got the error in the solve block (one equation one unknown. Running M14 M035.

Again, as written, this was working 15 minutes ago!

3 replies

R
RichardJ19-Tanzanite
19-Tanzanite
February 11, 2010
On 2/11/2010 4:52:43 PM, ElSid wrote:
>one equation
>one unknown.

And, apart from the problem of vel being both a function and a variable, if you are trying to solve for dia then you have two unknowns: dia and flow (and if velocity is defined as a function of flow, then velocity is not defined either).

Richard
E
ELSID1-VisitorAuthor
1-Visitor
February 11, 2010
Then why was it working 15 minutes ago? HMMM. I'll post the whole file. This was a problem that Stuarts assisted me with a few months ago.
http://collab.mathsoft.com/read?130625,63
I
IRstuff1-Visitor
1-Visitor
February 11, 2010
On 2/11/2010 5:22:50 PM, ElSid wrote:
>Then why was it working 15
>minutes ago? HMMM. I'll post
>the whole file. This was a
>problem that Stuarts assisted
>me with a few months ago.

If you disable the vel(flow):= definition, the solve block produces an answer.

TTFN,
Eden
R
RichardJ19-Tanzanite
19-Tanzanite
February 11, 2010
On 2/11/2010 4:52:43 PM, ElSid wrote:

>Again, as written, this
>was working 15 minutes ago!

That's not possible.

You have "vel" defined as a function (of "flow"), but you are using it in the solve block as a variable.

Richard
I
IRstuff1-Visitor
1-Visitor
February 11, 2010
On 2/11/2010 4:52:43 PM, ElSid wrote:
>Can someone verify this. I
>had a perfectly working sheet
>last month. I went in to do
>some text edits. When I
>re-saved, I got the error in
>the solve block (one equation
>one unknown. Running M14
>M035.
Again, as written, this
>was working 15 minutes ago!

Seems to me that the naming of the function to be the same as the changing parameter is problematic.

TTFN,
Eden
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