KhiCAS, le moteur formel Giac/Xcas pour toutes TI-Nspire

My calculator programs · by **Adriweb** » 04 May 2015, 02:36

Out of curiosity, does it still crash when opening a "standard" tns file in between ?
Maybe some things don't get restored well under specific circumstances... who knows, especially when it's not reproducible on everyone's machine

→ **MyCalcs** profile · by **Strontium** » 04 May 2015, 05:34

Nope, still crashes. I've begun to think that it's an issue with ndless, not KhiCAS.

→ **MyCalcs** profile · by **Vogtinator** » 04 May 2015, 08:47

Entirely possible, but to solve the issues some more testing is needed.
Can someone try to reproduce the crashes on OS 3.6 with the new and old ndless_resources?

→ **MyCalcs** profile · by **Strontium** » 08 May 2015, 07:31

I found a \LOGS direction in root. It appears it stores some crash logs. Could it be of any use?

→ **MyCalcs** profile · by **Vogtinator** » 08 May 2015, 19:04

If you got a XXXX_exception logfile, you can upload it, although it won't be easy to read and make use out of it.

→ **MyCalcs** profile · by **Strontium** » 10 Jul 2015, 01:45

I tried out Khicas in Firebird using the files I got from my own calculator using Polydumper. KhiCAS still causes a crash under the same circumstances.

Here is the entire log from the serial monitor, from first boot, to installing ndless, to using KhiCAS, to the crash.
http://pastebin.com/5w46wrb7

I'm not sure if it will help at all. One thing I have noticed, though, is that the line

Code: Select all: Module ID lookup failed for module 646f6362 in TI_RM_GetString()

appears a ton while browsing the documents until I install ndless. I am unsure if that is a problem with the emulator or not, though.

The debugger displays this line when the (emulated) calc crashes:

Code: Select all: Warning (1037e4f4): Data abort: address=74f9f708 status=05 instruction at 1037e4f4

→ **MyCalcs** profile · by **Vogtinator** » 10 Jul 2015, 13:19

I can reproduce that issue 4 out of 5 times (once it was a lua script error: "attempt to call global 'View' (a table value)") on Ndless 3.6 (old), Ndless 3.6 (new) and Ndless 3.9.1.
The crash is internally to lua, so it's likely that something is wrong with luagiac, maybe memory corruption like an off-by-one-error. It doesn't crash for me if nothing was evaluated.
I just tried with gdb, I can debug khicas just fine with the latest firebird release.

Strontium wrote:I'm not sure if it will help at all. One thing I have noticed, though, is that the line
Module ID lookup failed for module 646f6362 in TI_RM_GetString()
appears a ton while browsing the documents until I install ndless. I am unsure if that is a problem with the emulator or not, though.

That's a bug in the OS that was so annoying that ndless fixes it.

→ **MyCalcs** profile · by **profrd** » 26 Nov 2015, 14:10

Concerning the Crashes reported by [ Strontium ] I notice on the posted Youtube Video at https://www.youtube.com/watch?v=x8jGmwUyYyc that his Calculator is probably Connected by the USB port to his PC.

Sometime ago I have been aware of a Ndless "bug" which resulted in a similar Crash with [ Reboot ] if someone presses the [ Scratchpad ] button while the Calculator is still [ Connected ] by the USB Port.

I don´t know if this may be the cause of the problem ocurring to [ Strontium ], but it sure may lead to some new "light" or at least another "direction" of investigation, since it may actually be a [ Ndless ] problem and not a [ KhiCAS ] fault.

I still have OS engine 3.6, ( both on Nspire CX CAS Calculator and also on K-ARM TI ) but have not yet installed [ KhiCAS ] on them.

Another suggestion would be to see if the Crashes still occur not just only on a Physical TI-Nspire Calculator ( disconnected from USB port ), but also with an Emulator ( like K-ARM TI or nspire_emu ) running the Same OS Version ( extracted from the Physical Calc by [ polydumper ] ).

My Sincere Best Wishes to All and Most Grateful Thanks to Parisse, Critor, Adriweb, SpiroH and many others with their More than Dedicated Passion and Effort, have been able to Rise the Standards by which today Calculators ( in face of the strong competition with Tablets and Smartphones ) still shows up as More than Useful and Attractive tools to all the New Generation of Students, and Certainly to the Old Generation of Teachers ( which someday in past were also Passionate and Dedicated Students ... )

→ **MyCalcs** profile · by **profrd** » 27 Nov 2015, 14:25

The link describing the [ Ndless ] Reboot process by pressing the [ ScratchPad ] button while still connected by the USB Port is https://ndlessly.wordpress.com/ndless-troubleshooting/

Concerning the suggestion for testing on other platforms like [ Emulators ], I notice that [ Strontium ] has already done so and Reproduced the error with the New [ Firebird ] emulator announced at https://tiplanet.org/forum/viewtopic.php?t=16652&p=183653 and available from GitHub at https://github.com/nspire-emus/firebird/releases, so it seems that the problem is a Bit More intricate one, and probably related with some abnormal interaction between KhiCAS and Ndless, deserving further investigation.

Thanks once more and a Very Nice Work to All !