Hi Allin,
Just wanted to note that when executing the freq command with the --silent flag, gretl pops up three error messages: (i) Failed to open file 'C:\....\gpttmp.a03344'; (ii) Unspecified error, and (iii) Failed to open file 'C:\...\gretltmp.png. However, these errors don't affect the output.
Best,
Artur