Error message :-
"C:\Program Files\gretl\wgnuplot.exe" "C:\Users\Brian\AppData\Roaming\gretl\gpttmp.84DH20": exit code 1
Forecast graph appears correctly with confidence interval. But the GUI Edit option on the graph crashes.

Version Gretl 2021-b.git
Windows X86_64
Build 2021-04-21

Brian J 
Professor Emeritus
Harper Adams University , Shropshire
Current Chair of Defra Economic Advisory Panel
Tel 01952 815237
Tel:           +44 1952 728153
Mbl           +44 7976 538712
University: +44 1952 815235