Help:VE17
From TrainzOnline
Attachment point '$(TAG_NAME)' in '$(CONT_NAME)' must be found in mesh '$(MESH_NAME)'."
The attachment point name used for the tag 'TAG_NAME' in the container 'CONT_NAME' was not found in the mesh. The name might be misspelled in the tag, or the attachment point might not exist.
See also: VE18.