I have a session with a panel data sample.

I run

smpl --no-missing Xlist

to restrict the sample.

Then I go to the GUI / Sample / Make current subsample permanent

I get a warning whether I really want to proceed, I select "yes" and I get

gretl: error "Command has insufficient arguments".

I just tried with a(nother) panel dataset here, and I'm not getting the warning nor the error. So I guess we ideally need your original data for testing, if that's possible.

cheers

sven