Ok, to install CalcSys I have to upgrade my calc OS, but it ALWAYS says "error ! please reboot calc". Then it re-tries to install the OS, and some time after, I get this error back ; I cannot anymore use my calc !!!

Ok if it's not possible, then I'll find something else
(but first, I'll try to update a working OS on my calc, at the moment I cannot, even the one that was already installed !!!! )

I think I got a reason to hate TI.

I think I've had a similar problem a while ago.
It happened to me when I wanted to download an OS on my calculator (TI84+ SE) with TI Connect.
It always kept failing and I couldn't get any OS on it.
eventually, I tried to do it through another pc (a 32-bit laptop instead of a 64-bit desktop, though that has nothing do with it I think) and then suddenly it did work.
So, I'd recommend trying to get the OS on your calculator through another pc, or by reinstalling the linking program you use and stuff like that, eventually I think it will work again.
also check the status of your cable and the usb port.

Do you happen to have OS 2.53/55MP installed? Those are not as stable as 2.43, although they have more features. Axe is supposed to work fine under any of these OSes, though. What else do you have installed?

No, I had the 1.18 OS, and tried to update 1.19 then I had this...

I think I've had a similar problem a while ago.
It happened to me when I wanted to download an OS on my calculator (TI84+ SE) with TI Connect.
It always kept failing and I couldn't get any OS on it.
eventually, I tried to do it through another pc (a 32-bit laptop instead of a 64-bit desktop, though that has nothing do with it I think) and then suddenly it did work.
So, I'd recommend trying to get the OS on your calculator through another pc, or by reinstalling the linking program you use and stuff like that, eventually I think it will work again.
also check the status of your cable and the usb port.

I re-installed the linking software (version 4.0, English ; notice : before I was on the French one), and tried to update to 1.18 (the one I already had). I did it !!! Then now, I'm using the 1.19 OS, and thank you very much jo-thijs for this suggestion.

I didn't try to re-install CalcSys, because I don't anymore want this...

End of the "topic" about my problems and CalcSys, I think there's nothing more to say about it, and if anybody wants to say something more, I think this topic isn't the good one...

Um, IDK if this has been asked in here yet, but will it gain color support?

Will Axe? I certainly hope so.

Idea, that would be REALLY great :
Nested libs. I had an idea, it's : 1st pass, compile and replace all prgmLIBSNAME by its commands, and if, at the 2nd pass, you find another prgmNESTLIB, then repeat 2nd pass ; end program compilation when there's no more lib to add.
But if someone creates a lib that includes itself ?

I do agree that fully supporting nested includes/libraries would be nice. Support for at least a few more nesting levels could possibly be added. Approximately what maximum level of nesting do you believe would be reasonable?

And if a library included itself, it would just keep including itself until an error occurs, whether it be due to the maximum nesting level being reached, RAM having been filled by the compiled program, or just duplicate definitions.

Do Axe Fusion support Axioms? Axiom based static libraries!

For now, Axe Fusion does not support external static libraries. It would be too difficult to implement in Axe's current state, but expect this to be possible in the next major revision of Axe.