Hello,

I would like someone to try to reproduce this (v.096 Stable and Night Build).

-Open both files "No_units_used.sm" and "Units_dont_mathc.sm" in the same instance of SMath using File|Open (not doubleclick on them)
-Then just recalculate. The strange "Units don't match" error will appear on the "Units_dont_mathc.sm". Look at the pictures please.
-If you open only the "Units_dont_mathc.sm" then everything is OK.
-If you just open only "Units_dont_mathc.sm" everything is Ok. Therefore, it seems that "No_units_used.sm" is the cause of problem.

In those files there are no units used (or at least I am not aware of that)

Regards,
Radovan

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Just to update this thread...

Here there is a file made with SMath 0.95 (1st screenshot) by omorr; the example show the bug directly (no needs to open a couple of files) in the root() function (SMath 0.96.4884 - 2nd screenshot) but I've noticed the same issue trying solving this problem using my Nonlinear Solvers, so I suppose it's something deep outside the root() code...


best regards,

w3b5urf3r

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Primer44w-1.sm (30 KiB) downloaded 135 time(s).

Wrote

I've noticed the same issue trying solving this problem using my Nonlinear Solvers

After a little "debug session" using the Nonlinear Solvers Broyden() function as reference, seems that the issue is related to the eval function ...

I attach here a screenshot of the code.. at the first loop the variables are those shown in the 2nd screenshot; the stack function doesn't cause issues, but enabling/disabling the eval the error disappear (at least for this piece of code)...

Hope this will be useful for Andrey


best regards,

w3b5urf3r

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Hello w3b5urf3r,

Try this please.

- Use the recent v0.96.4884. Open the sm file from this post ( broyden-method.sm ). Everything should be fine. Than close it.

- Open the above mentioned file ( Primer44w-1.sm ), then open ( broyden-method.sm ). Now, ( broyden-method.sm ) will fail with "Units don't match" (units wern't used).

- Now,without closing either of the two files, remove eval() from ( broyden-method.sm ) in the function definition - three commands

[MATH=eng]h:eval(-B*f(x0))[/MATH]

[MATH=eng]z:eval(f(x)-f(x0))[/MATH]

[MATH=eng]B:eval(B-{(B*z-h)*transpose(h)*B}/el((transpose(h)*B*z),1))[/MATH]

Now, function call will work and the results will be obtained. But, strangely, you can not get the numerical values of the function f(), only symbolical - see the first picture please.

Save the corrected ( broyden-method.sm )and close SMath. Reopen SMath and open just ( broyden-method.sm ). Now, everyrhing is fine (the second picture)

Regards,
Radovan

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Confirmed (by opening the files in the same instance of SMath using File|Open or by dragging the 2nd file on the canvas); this confirms in some way the eval() role in this bug...

best regards,

w3b5urf3r