Graphs: Saving and Reusing later

Dear Statas,

I am using Stata (14) at work and want to save some graphs (in gph-format) to reuse/edit it later at home with Stata Graph Editor. At home I am using Stata 13.1. I save the graph with "graph save $graphs\1.gph, replace". However, if I want to open it at home with "graph use $graphs\1.gph", Stats says: "invalid file specification". Is this a version problem or do I use a wrong syntax?

Thanks,
Adam