So I opened an older drawing FF 1021-22 which links to model of the same name.
I opened the model and saved as FF 1090-91.sldprt which converted the older file as expected.
Then I tried to save the drawing as FF 1090-91.slddrw, but the linked file is not FF 1090-91.sldprt nor FF 1021-22.sldprt, but FF 1041-42.sldprt????
I checked the references in the drawing, but FF 1041-42 is not mentioned.
I checked the View palette, just to be certain FF 1041-42 wasn't open in the background, and it is not.
Note, I opened the model that I saved from the drawing with a RMB>open part file.
So before I saved the drawing as FF 1090-91 I made a copy of FF 1041-42.sldprt.
After saving the drawing, I found that FF 1041-42.sldprt was indeed saved today as SW said it would be.
But so was my new file FF 1090-91.sldprt.
So where else might this part be linked?
Is there another way to find hidden references?