Puzzling Crash when Incorporating ClassAct Example

[tygre]

Hi there!

I've been trying to use gadgets provided with the free ClassAct (users, developers) and I'm facing a very puzzling crash (to me!)

I can compile and run the example ClickTabExample.c just fine. When I copy/paste its content into my code, I can compile it but running it always lead to a MuForce hit that I cannot explain

I'm using the same VBCC, the same includes, the same options, etc. as far as I can see... I'm sure that I'm missing something here, could you help please?

Cheers!

[Don_Adan]

Looks like jmp/jsr to not opened library, A6 (base) is null/zero.

[Minuous]

There is an error in your program (and in the original example): the code calls FreeClickTabNodes() even when the OpenLibrary() on clicktab.gadget was unsuccessful. I've fixed this bug for the next release of the NDK.

But more generally I would recommend using later versions of ReAction classes rather than ones that are decades old. Dozens of bugs have been fixed since then, see eg. the OS3.9, OS3.2, OS3.2.1 changelogs.

[tygre]

Hi Don and thanks!

Originally Posted by Don_Adan

Looks like jmp/jsr to not opened library, A6 (base) is null/zero.

I will double-check but, as far as I can tell, I open all the needed libraries... the MuForce report does not say which one by chance?

Cheers!

[tygre]

Hi Minuous!

Originally Posted by Minuous

There is an error in your program (and in the original example): the code calls FreeClickTabNodes() even when the OpenLibrary() on clicktab.gadget was unsuccessful. I've fixed this bug for the next release of the NDK.

But more generally I would recommend using later versions of ReAction classes rather than ones that are decades old. Dozens of bugs have been fixed since then, see eg. the OS3.9, OS3.2, OS3.2.1 changelogs.

Yes, I had fixed this bug in a previous version but I reverted to the original because I couldn't figure out the crash (and wanted to limit the differences to the minimum)...

Regarding ReAction, I'd like to use it later but right now I'm still learning

Also, on a tangential topic: ClassAct v3.3 is free but I'm not sure that anyone can install ReAction freely too? (I bought copies of AmigaOS v3.2 but I'd like to be as inclusive as possible )

Thanks!

[Don_Adan]

Originally Posted by tygre

Hi Don and thanks!



I will double-check but, as far as I can tell, I open all the needed libraries... the MuForce report does not say which one by chance?

Cheers!

No library name, but LVO value can be calculated.
-636
Then library seems to be easy to find. If you check your program code for used LVO values.

[tygre]

Hi Don and thank you so much!

You put me in the right direction: somehow, I didn't open the Intuition and Graphic libraries

Now that I fixed my code, the example works and I can now move on to building my UI

Cheers!