How do I change 2+ namelists with build_namelist?

[gus@ldeo_columbia_edu]

How do I change more than one namelist with build_namelist?

For instance, suppose I want to change the driver stop_option, stop_n,
and the atmosphere CO2 mixing ratio.

I tried these five slightly different syntaxes:

1) -namelist "&seq_timemgr_inparm stop_option='nyears' stop_n=1 &cam_inparm co2vmr=734.0e-6"
2) -namelist "&seq_timemgr_inparm stop_option='nyears' stop_n=1, &cam_inparm co2vmr=734.0e-6"
3) -namelist "&seq_timemgr_inparm stop_option='nyears' stop_n=1","&cam_inparm co2vmr=734.0e-6"
4) -namelist "&seq_timemgr_inparm stop_option='nyears' stop_n=1" -namelist "&cam_inparm co2vmr=734.0e-6"
5) -namelist "&seq_timemgr_inparm stop_option='nyears' stop_n=1", -namelist "&cam_inparm co2vmr=734.0e-6"

With 1, 2, 3 build_namelist hangs and never returns.
With 4,5 build_namelist produces the namelists but doesn't apply the changes in the -namelist option.

Is there a way around?
Did I miss some detail in the syntax?

I could edit the namelists by hand instead.

Than you.
Gus

 

[hannay]

Use:
$cfgdir/build-namelist -s -case casename -runtype initial
-namelist "&atm stop_option='nyears',stop_n=1,co2vmr=734.0e-6 /"

It will automically put the namelist variables in the appropriate namelists.

 

[eaton]

Cecile has give the best solution. Here is some additional information:

Note that all five attempts contain incorrect namelist syntax: they all lack the final "/". Unfortunately the simple namelist parsing code that we're using is not reporting this fact. I'll add that to my list of future improvements.

Only one -namelist argument should be used. If multiple -namelist args are present only the final one will be recognized (assuming that it's value contains correct syntax).

It is possible to put multiple namelist groups in the -namelist value. But there is no advantage to doing so since build-namelist ignores the group names anyway. They are only required because the namelist parser requires valid namelist syntax. build-namelist is using a definition file to check user input and part of the definition of a namelist variable is the group it belongs to. build-namelist puts the variables in the correct group and writes the groups into the correct output files. This makes it much easier for the user to produce correct namelist files.

 

[gus@ldeo_columbia_edu]

Thank you, Cecile and Brian.
Cecile's solution works perfectly.

I just noticed that I should have posted this question
on another forum: "Questions about the namelist".
Sorry for misplacing it.

Gus