Solved: Using missing texture, unable to load:

After three hours wrestling with this damn error:

[sEVERE] [Minecraft-Client] Using missing texture, unable to load: testitemrendering:textures/items/Error.png

I finally figured out where to place my icons and textures so that Minecraft will find them.

In order to find the icon corresponding to

itemIcon = iconRegister.registerIcon("TestItemRendering:Error");

it is constructed as :

{base path}/assets/{mod name}/textures/items/{Icon name}.png

In my case, this comes out as

C:\Documents and Settings\TheGreyGhost\My Documents\IDEAprojects\ForgeCurrent\out\production\TestItemRendering\assets\testitemrendering\textures\items/error.png

where my base path was

C:\Documents and Settings\TheGreyGhost\My Documents\IDEAprojects\ForgeCurrent\out\production\TestItemRendering

The hardest bit was figuring out what the base path should be, it will be different for you of course.

I finally found it by inserting a breakpoint in here.

    public AbstractResourcePack(File par1File)
    {
        this.basePath = par1File;
    }

If that doesn't work for you, you might also try

FolderResourcePack 
    protected boolean makeFullPath(String par1Str)
    {
        return (new File(this.basePath, par1Str)).isFile();
    }

FileResourcePack
    protected boolean makeFullPath(String par1Str)
    {
        return (new File(this.basePath, par1Str)).isFile();
    }

It looks like the handling of Resources has been changed yet again.

FolderResourcePack::

    protected InputStream getInputStreamByName(String par1Str) throws IOException
    {
        return new BufferedInputStream(new FileInputStream(new File(this.resourcePackFile, par1Str)));   // breakpoint here
    }

--> look in this.resourcePackFile

(may need to continue several times until you find the right one).

or alternatively

    protected InputStream getInputStreamByName(String par1Str) throws IOException
    {
        System.out.println("this.resourcePackFile:" + this.resourcePackFile.toString());           // todo: debugging only, remove
        return new BufferedInputStream(new FileInputStream(new File(this.resourcePackFile, par1Str)));
    }

-TGG

For my normal eclipse setup and gradle configured arrangement, I found that it looks for such things here:

<PROJECT_LOC>\src\main\resources\assets\<modid>\textures\blocks\<blocktexture>.png

<PROJECT_LOC>\src\main\resources\assets\<modid>\textures\items\<itemtexture>.png

As for other things, I haven't used them yet. So, I dunno.

I believe the default location is the workspace directory, where build.gradle is located. Assets of course follow the format mentioned above, but resources that are not prefixed with "modid:" / (modid, ...) need to be specified in relation to the base working directory.