Attached sm file which appeared recently in the forum works in 7030 (stable), but throws errors in 7067 (Beta).
Some times it crashes when trying to evaluate some variables.
ISERROR QUESTION MARK_B (1).sm (18 КиБ) скачан 60 раз(а).

Confirmed,

Sometimes crashed (red cross over the screen) and sometimes didn't.




Regards,
Radovan

Hi. I don't see a bug here, but some kind of issue handling n. About the WYSIWYG notation, it's well know this kind of difficulties not only in SMath, but in mathcad, maple and mathematica too. About the issue with n it must to be solved using Clear, because n isn't local in the sum.



ISERROR QUESTION MARK_Clean.sm (10 КиБ) скачан 37 раз(а).

Best regards.
Alvaro.

Thank you Alvaro, you are right

This problem with summation will come up here and there. It would be enough to put the summation terms inside a single line environment. This behaviour is present in SMath for quite a while. This is easy to forget, but it should not have crashed in those cases. The problem is how to remember this issue and overcome situations like this one.



Regards,
Radovan

Wrote

Thank you Alvaro, you are right

This problem with summation will come up here and there. It would be enough to put the summation terms inside a single line environment. This behaviour is present in SMath for quite a while. This is easy to forget, but it should not have crashed in those cases. The problem is how to remember this issue and overcome situations like this one.

Can't be more right ! Now you understand why I never updated.
How do you know if it is simply a beta version bug ?

Try this Fourier-algo style.

Fourier Integral Algo Style.sm (7 КиБ) скачан 41 раз(а).

Wrote

Try this Fourier-algo style.

Leave default integral acc 100, only 'N'
Rejects SQRT(x) but takes SQRT|(x)|
Try more ... let us know about your version ... Jean

Generally, the range Σ free style works at time of creation but fails back on new session.
But if included in line program, works for ever. My fft(,) ifft(,) work since day 1 [2015].
The free style Σ is not recognized by Smath kernel.
I have more than fft(,) ifft(,) like Simplex lot more involved works great within line.
I wish to read "Thanks Jean, doctored".

Wrote

Leave default integral acc 100, only 'N'
Rejects SQRT(x) but takes SQRT|(x)|
Try more ... let us know about your version ... Jean

Thank you Jean.

Wrote

but it should not have crashed in those cases. The problem is how to remember this issue and overcome situations like this one.

The attached sm file also crashes some times when inputs to Polyroots, solve, maple(solve)
are changed or adjusted.
Roots_Ex1.sm (16 КиБ) скачан 33 раз(а).

Tried but it did not crash.

Regards,
Radovan

I had 2 or 3 crashes while testing. It was very strange.
I will try more variations and post if there is any crash.
Thank you you Radovan.

Wrote

The attached sm file also crashes some times when inputs to Polyroots, solve, maple(solve)
are changed or adjusted.

That shouldn't happen, but maybe on latest beta.
1. Polynomials have unique Lagrange format [lot many books are wrong].
2. maple(op(F(u))) will save you manual steps and possible typo errors.

Cheers ... Jean



Maths eigenAll Companion.sm (62 КиБ) скачан 28 раз(а).

Please remember to copy and attach here the stack traces when you encounter such critical errors, especially if they are not easily reproducible like this.

Wrote

Please remember to copy and attach here the stack traces when you encounter such critical errors, especially if they are not easily reproducible like this.

Even after a Clean Re-installation, crashes continued to occur on and off.
Attached sm file crashed when I was doing some changes to either default units,
or copying etc. (I'm not sure). Note where I clicked.
Radial Gate Ex 1.sm (194 КиБ) скачан 33 раз(а).

Wrote

Even after a Clean Re-installation, crashes continued to occur on and off.

Second crash. BTW how do I create stack traces and copy?
Radial Gate Ex 1.sm (195 КиБ) скачан 30 раз(а).

Still not able to reproduce but at least we have an hint.

Wrote

BTW how do I create stack traces and copy?

Simply copy the text from the error window



You can paste in the following BBcodes if it is too long

[spoiler]my text goes here[/spoiler]

or

[code=markup]my text goes here[/code]

Thanks Davide.
Third crash occurred, and the stack traces (in MS Word) attached.
Radial Gate Ex 1.sm (195 КиБ) скачан 35 раз(а).
7067 3rd Crash-Stack Traces.docx (18 КиБ) скачан 31 раз(а).

In 4 years Smath I have observed ONE crash from a corrupted region.
Same in 15 years Mathcad , but several times MCD. Corrupted region
has no explanation. The only cure found was to re-code piece wise
on blank sheet. You could try to isolate the components ...
B1:=B1, C1:=C1 ...etc. even transit via spool to file.
That it crashes by clicking on result once displayed has no other
explanation than critical error, from unknown cause.
Sorry Collab: can't help more, it looks a bug wrt latest beta.
Curiously no more Collab reported such a bug.