Acessing max file metadata and asset properties

Hi folks,

I wonder if someone can point me in the right direction. Im building an external asset tracker, have managed to relinking the files without issue. I cant seem gain access a max files asset state ie. missing or not.

to relink im using getMAXFileAssetMetadata and setMAXFileAssetMetadata. How do I display #(missing) for each asset from the metadata? do i need to access the asset manager or ATSOps? how is that done on an external file and not opening it?

thanks so much..