graph combine gives error "series 3 not found"

[Jane Fry]

Hi,

I am trying to create a combined graph of (separate) min, max and midnight temperature and precipitation with series for 1940 and 2022 in York (i.e. just 4 individual graphs).

I have used the following code:

twoway (sc min_temp month_day if lad_name=="York" & year==1940, yaxis(1) msize(tiny) legend(label(1 "1940"))) || ///
    (sc min_temp month_day if lad_name=="York" & year==2022, yaxis(1) msize(tiny) legend(label(2 "2022"))), title("Min temp in York") name("min_temp", replace)

twoway (sc max_temp month_day if lad_name=="York" & year==1940, yaxis(1) msize(tiny) legend(label(1 "1940"))) || ///
    (sc max_temp month_day if lad_name=="York" & year==2022, yaxis(1) msize(tiny) legend(label(2 "2022"))), title("Max temp in York") name("max_temp", replace)
    
twoway (sc Temperature_Midnight month_day if lad_name=="York" & year==1940, yaxis(1) msize(tiny) legend(label(1 "1940"))) || ///
    (sc Temperature_Midnight month_day if lad_name=="York" & year==2022, yaxis(1) msize(tiny) legend(label(2 "2022"))), title("Midnight temp in York") name("midnight", replace)
    
twoway (sc total_precip month_day if lad_name=="York" & year==1940, yaxis(1) msize(tiny) legend(label(1 "1940"))) || ///
    (sc total_precip month_day if lad_name=="York" & year==2022, yaxis(1) msize(tiny) legend(label(2 "2022"))), title("Precipitation in York") name("precip", replace)
    
graph combine min_temp max_temp midnight precip, name(all, replace)

My problem is that Stata gives me an error:

series 3 not found

I'm wondering what is the problem given that Stata generates each graph individually.
Grateful for any help.

[Nick Cox]

I don't recollect seeing that error message before. It's hard to say more without a data example to reproduce the problem.

It would be a bit of work but it should be possible to recast the problem as one for the by() option not graph combine.

See https://journals.sagepub.com/doi/pdf...36867X20976341

[Jane Fry]

Thanks Nick. Seems the problem was related to too many graphs open. When I cleared everything it worked. Should have thought about that first!