Re: [ferret_users] [ferret users] add_connect: too many connects, cannot add another

[Fabian Lienert <cccma-student-003@xxxxxxxx>]

> Hi group,
>
> At the moment I cannot search the archive, but are wondering if there is 
> a simple way around the following error:
>
> add_connect: too many connects, cannot add another
>
>  ** netCDF error: NCSYSERR
>
>  is this a CDF file ?
>
> when I try to add a 33 netcdf file to the session? Presumably it is some 
> kind of limit? I would like to have all sets available at once if 
> possible, without having to modify them?

Hi Mark,

You can either save your data after some steps of processing it. For 
instance save the winter temperatures using monthly mean data:

let tas_djf = (tas[d=1]+tas[d=2]+tas[d=3])/3
save/clobber/file="winter.nc" tas_djf

Then restart Ferret and load winter.nc in order to save file connections.

Or you need to create .des text files that describe the input netCDF 
files to be loaded and place them on a time axis. On Linux, this file 
looks like the input_descriptor_file.des below.
Then load the .des file only:
set data input_descriptor_file.des

Good luck,

Fabian

## <input_descriptor_file.des>

&FORMAT_RECORD
   D_TYPE      = '  MC'
   D_FORMAT    = '  1A'
/

&BACKGROUND_RECORD
   D_TITLE     = ''
   D_T0TIME    = '16-JAN-1960 00:00:00'
   D_TIME_UNIT = 31557600
   D_TIME_MODULO      = .FALSE.
   D_CALTYPE   = 'GREGORIAN'
/

&MESSAGE_RECORD
   D_MESSAGE   = ' '
   D_ALERT_ON_OPEN    = .FALSE.
   D_ALERT_ON_OUTPUT  = .FALSE.
/

&EXTRA_RECORD
/

&STEPFILE_RECORD
   S_FILENAME  = 'file1.nc'
   S_AUX_SET_NUM      = 0
   S_START     = 1
   S_END       = 1
   S_DELTA     = 1
   S_NUM_OF_FILES     = 1
   S_REGVARFLAG       = ' '
/

&STEPFILE_RECORD
   S_FILENAME  = 'file2.nc'
   S_AUX_SET_NUM      = 0
   S_START     = 2
   S_END       = 2
   S_DELTA     = 1
   S_NUM_OF_FILES     = 1
   S_REGVARFLAG       = ' '
/
&STEPFILE_RECORD
   S_FILENAME  = '**END OF STEPFILES**'
/
## </input_descriptor_file.des>
--
Fabian Lienert
PhD Student
Canadian Centre for Climate Modelling and Analysis
Meteorological Service of Canada
School of Earth and Ocean Sciences
University of Victoria
P.O. Box 1700
Victoria, BC  V8W 2Y2
CANADA

phone:  +1(250)363-8242
e-mail: cccma-student-003@xxxxxxxx