Hey @ECHekman,

Thank you for reaching out to us.

@ECHekman said in Getting debugbreak in atom.cpp:

Here is how i create the UI
// in MyData::GetDDescription() BaseContainer bc = GetCustomDataTypeDefault(DA_CONTAINER); bc.SetInt32(DESC_CUSTOMGUI, CUSTOMGUI_OCIOCYCLE); bc.SetString(DESC_NAME, String(pinInfo->mStaticLabel)); bc.SetBool(DESC_SCALEH, TRUE); description->SetParameter(IDCopy, bc, groupID);

That, the GetCustomDataTypeDefault(DA_CONTAINER) call, is illegal code. Check our documentation for the function. It could probably be put a bit more verbosely into the docstring, but:

cb400f4a-9cf9-43eb-83b2-0bd37b7127f8-image.png

DA_CONTAINER is not a resource data type. Which is a fancy way of saying that a C4DAtom parameter cannot be of data type DA_CONTAINER. On line 439 in atom.cpp is no crit stop (at least in the version of atom.cpp for 2025.2.x.yyyyyy I looked at), but on line 476 there is. This is inside C4DAtom::SetParameter, and it gets there the ID of the parameter container of the description element which shall be written, then switches through all the atomic DTYPE_ and when none matches, calls at the end FindResourceDataTypePlugin() on the ID of the parameter container, i.e., what you initialized as DA_CONTAINER. When it cannot find anything there, it raises the crit stop.

When you want to have there some OCIO data bundle, you probably should also implement a data type for it. Otherwise you should try DTYPE_SUBCONTAINER. But I am not sure how nicely DTYPE_SUBCONTAINER will play with custom GUIs. In general I would lean towards that writing a container as a singular parameter with a GUI like this is not intended, but you can try your luck. What will work in any case, is implementing your own data type.

And to be verbose, a resource data type is a data type that can be used in resources, i.e., res files.

Cheers,
Ferdinand

Example of ObjectData in Maxon API only?