
I’m getting this error while using Compositing Nodes, I need to use AlphaOver to overlap renderings. So when I attempt to define the location of the respective source files is when I get this.
Thanks for the suggestion Atom. But neither location nor simple names have helped 
As for naming conventions, I didn’t have any apostrophes nor any special characters, but I did have spaces. So I replaced them with underscores.
As for locations, I moved some of the sequenced animation files to C:\Temp. And I kept getting the same error 
Btw I am using 2.57.1, r36339 (I think it’s also known as 2.57b). It’s supposed to be the first “stable” release.
JDL