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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 (19kb) downloaded 39 time(s).  |
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Confirmed, Sometimes crashed (red cross over the screen) and sometimes didn't.   Regards, Radovan Edited by user 11 May 2019 09:45:42(UTC)
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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 (11kb) downloaded 19 time(s).Best regards. Alvaro.
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on 11/05/2019(UTC), on 11/05/2019(UTC), on 11/05/2019(UTC), on 11/05/2019(UTC)
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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 Edited by user 11 May 2019 12:37:55(UTC)
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on 11/05/2019(UTC), on 11/05/2019(UTC)
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Originally Posted by: omorr  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 (8kb) downloaded 20 time(s).
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Originally Posted by: Jean Giraud 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 
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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".
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Originally Posted by: Jean Giraud 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.  Edited by user 12 May 2019 07:17:45(UTC)
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Originally Posted by: omorr 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 (17kb) downloaded 16 time(s). Edited by user 12 May 2019 10:35:55(UTC)
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Tried but it did not crash.
Regards,
Radovan |
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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. |
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Originally Posted by: ndtma 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 (63kb) downloaded 13 time(s).
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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.  Edited by user 12 May 2019 20:07:55(UTC)
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Originally Posted by: Davide Carpi 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 (195kb) downloaded 15 time(s). Edited by user 13 May 2019 07:08:06(UTC)
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Originally Posted by: ndtma 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 (196kb) downloaded 15 time(s). Edited by user 13 May 2019 12:05:56(UTC)
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Still not able to reproduce but at least we have an hint.  Originally Posted by: ndtma 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] Edited by user 01 July 2019 01:20:30(UTC)
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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.
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