comp.lang.idl-pvwave archive: archive » Re: Can't get out of define mode in ncdf, not specific to variable.

Home » Public Forums » archive » Re: Can't get out of define mode in ncdf, not specific to variable.

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Can't get out of define mode in ncdf, not specific to variable. [message #82059 is a reply to message #82058]

Fri, 16 November 2012 15:25

Paul Van Delst[1]
Messages: 1157
Registered: April 2002

Senior Member

How many variables are you writing? What version of IDL? What version of
netCDF?

If you are writing lots of variables, there used to be a limit to the
total number (in older netcdf's at least. I think it was 300).

Complete shot in the dark.....

On 11/15/12 17:57, neleh.mac wrote:
> So I am using IDL to read in ncdf data, and write out (to a new
> file)
> the processed data. So I go to define mode, set up the variable, add
> some attributes, switch to data mode, stick in the data, and then go
> back to define for the next one.
>
> e.g.
> ncid = ncdf_create(file_name, /CLOBBER)
> londim = ncdf_dimdef(ncid, 'longitude_dim', 144)
> latdim = ncdf_dimdef(ncid, 'latitude_dim', 91)
>
> vid = ncdf_vardef(ncid, 'emission', [londim,latdim], /float)
> ncdf_attput, ncid, vid, 'long_name', "Some emissions"
> ncdf_control, ncid, /ENDEF
> ncdf_varput, ncid, vid, emiss_dat
> ncdf_control, ncid, /REDEF
>
> vid = ncdf_vardef(ncid, 'emission2', [londim,latdim], /float)
> ncdf_attput, ncid, vid, 'long_name', "Some emissions 2"
> ncdf_control, ncid, /ENDEF
> ncdf_varput, ncid, vid, emiss_dat2
> ncdf_control, ncid, /REDEF
>
> ... etc.
>
> This works fine for several variables, over and over, until a certain
> point in the code and then at it will not get out of define mode. I
> commented out that particular part of the code where it was falling
> over, and got it to work fine (but my output file now has one less
> variable).
>
> Now the weird part.
>
> If I take the chunk of code for the variable that it falls at, and
> copy it back in further up the code, it works through it fine. It
> only fails when it gets to that line again, this time on a variable
> it wrote fine first time round.
>
> It's like it's failing after going into define mode a certain number
> of times, it's not specific to any variable I'm trying to write, it
> just always fails on the nth one, regardless of what it is. I've
> swopped round the order it writes them to the file, and they all get
> written, just not if they happen to be at a certain point in the
> order. I have tried removing attributes from the variables but this
> doesn't seem to have any effect. I am very confused by this, please
> can you help?

Report message to a moderator

[Message index]

		Re: Can't get out of define mode in ncdf, not specific to variable. By: Fabzi on Fri, 16 November 2012 19:35
		Re: Can't get out of define mode in ncdf, not specific to variable. By: Paul Van Delst[1] on Fri, 16 November 2012 15:25
		Re: Can't get out of define mode in ncdf, not specific to variable. By: Chip Helms on Fri, 16 November 2012 10:46
		Re: Can't get out of define mode in ncdf, not specific to variable. By: David Fanning on Thu, 15 November 2012 16:53
		Re: Can't get out of define mode in ncdf, not specific to variable. By: neleh.mac on Mon, 19 November 2012 11:46

Previous Topic:	Re: Rare View of Aurora Australis
Next Topic:	procedure in case statement

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 19:17:35 PDT 2025

Total time taken to generate the page: 0.00384 seconds