See SkeletonBatch::setBufferSize: Sets the max number of vertices that can be drawn in a single frame. Best to call before getInstance is called for the first time. Default is 8192.
So you can call this before doing anything else:
SkeletonBatch::setBufferSize(12000);
However, I've just done a commit so the SkeletonBatch will grow automatically. It is still more efficient to set it to the right size beforehand, else it will resize the buffer the first time its capacity is exceeded.
