I'm running into an error while loading pictures to an imagelist for a treeview. OLE error code 0x800a01e1: Unknown COM status code

I was running this treeview in an exe all morning. The other day, this happened with bmp graphics. I changed the bmp to an ico and things were fine. Now I'm getting this message on ico graphics too.
There is a method in the treeview's parent container called .AddPictures which takes an array of graphics to load into the imagelist. It's in a FOR loop to load all pictures in the array.

.Add(lnPicture, ;
laPictures[lnPicture, 1], ;
LoadPicture(laPictures[lnPicture, 2]))

laPictures is two columns.

1 = A text key "Close"
2 = path to graphic "\BaseFolder\Graphics\Clsdfld.ico"

Any known issues with loading an imagelist this way?

Steve