Error Message When Importing Shadow Mesh

I do have the cas tools in blender. I don't know if I scaled the mesh in edit mode, but it was probably in object mode? I just selected it, then hit the scale button and moved my mouse and eyeballed when it looked the right size.

The original shadow mesh does have a vertex group, but it is located in the rig. The normal mesh has a vertex group located within one of the S4Studio_meshes and another one located in the rig.  The long error message appears once I have deleted the vertex group from the mesh and attempt to import it into the program.

*Edit*

Additionally, it just dawned on me to try putting it into a new package, rather than the one it came in. I used the "Garden Friend" object and the 'create 3d mesh' option, then exported the original mesh, resized it and added it in. It went in perfectly normally, as did the shadow when I did it the way I normally do and just changed the S4 numbers to zero. But trying to import the shadow file that I'd deleted the vertex group from did not work and produced another error message. So there's something weird about that particular package's shadow file that's prompting it to not like the original import with the vertex group, and then something about deleting the offending vertex group which causes an error of its own. 

So I have made it work, but I would still like to know what the issue is, in case I run into it in the future, if anyone could tell me. 

Hi. Not sure what you're asking but decor objects like what the OP was trying to make will consist of the main mesh with a cut number of 1 and the flat plane that's for the floor shadow with a cut number of 0. The main mesh should have the transformBone assigned. All static items use this bone and all static items require a rig, as well. Don't know why. The flat plane should have no vertex group assigned. 

The shadow meshes, which are used for sun shadows when the object is outdoors, should consist of just the main mesh with a cut number of 0 and the transformBone vertex group assigned. There will be no flat plane. Just the main mesh.

The cut numbers are used by Studio (not the game) so that Studio knows which mesh is which. 

The process is goes like this:

*Open the EA item you cloned,.

*Append your item and place it so it sits in roughly the same spot as the EA item.

*Delete the EA mesh and assign your mesh a cut number of 1. I'm not even sure if you have to assign transformBone at all. I think Studio will do it for you. At least it used to be that way. 

*IF you have to assign the bone to your mesh, click the plus button in the vertex group area and rename the new bone to "transformBone." It has to be named exactly with the "B" capitalized. Edit mode, press A, in the vertex group click the "assign" button. If you go into weight paint mode the mesh should be red indicating that it's been assigned 100% to transformBone. 

*There should already be a flat plane with a cut number of 0 present. You can resize it if you want. Do so in edit mode. You can adjust the blob sheet as well and see how the flat plane is affected in real time. Step #46 of this tutorial describes how but it's for an older version of Blender.

*You can do this in newer versions but getting the texture to show on the mesh requires you to assign a new material and import the shadow's blob sheet texture.

    *In the UV editor, open the blob sheet. Click Image > Save As  and save the blob sheet as a PNG. 

    *Here's how to import the blob sheet texture as a material and it's for Blender 3.3:



*Save. This is your LOD 0. Repeat the process for the other LODs. 

*Open your LOD 0 and delete the flat plane.

*Assign a cut number of 0. DO NOT touch the bone assignment. 

*Save. This is your shadow LOD 0. Repeat the process for the other LODs.