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Re: frustrated by hdf_sd_adddata [message #24200 is a reply to message #24187]

Thu, 15 March 2001 08:18

George McCabe
Messages: 23
Registered: June 1997

Junior Member

<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
james,
thanks for you many suggestions.
can you tell me what do you mean by 'corrupt'. though i think that i
understand the use of idl's hdf procedures, my general experience is limited.
i am curious about occurances of hdf file corruption.
this discussion is perhaps no longer relevant to my particular problem+solution.
today, under a new idl session writing data to the same HDF file with
the same code it works, so i am wondering about software interface errors,
buffer problems, etc. maybe i'll just pretend it never happened.
thank you again,
 george
  
James Kuyper wrote:
<blockquote TYPE=CITE>George McCabe wrote:
 >
 > hello,
 >
 > attempting to replace a subset of existing data in an HDF SD, using
 > idl procedure hdf_sd_adddata, receive the following error which i
can
 > not readily diagnose -
 > % HDF_SD_ADDDATA: Unable to write the specified HDF-SD slice.
 >
 > hdf opens, sd starts /RDWR ok, sd selected ok
 > i have veryfied the size and order of the data variable, count and
 > start keyword variables.
 >
 > help is appreciated,
 > george
Some things to check:
You might not have access. What are the file permissions, owner, and
 group membership?
The file may be corrupt. Can you view the HDF file with ncdump, or
 similar utilities? Can you open it read-only, and view its contents
 using HDF_SD_GETDATA?
Is this new code, or code that has already worked on a different file,
 but is failing with this one?
You imply that you've already collected the following information, and
 that it checked out OK, but maybe you've misinterpreted it - could
you
 tell us:
What values does HDF_SD_GETINFO give you for DIMS, HDF_TYPE, and TYPE?
What values are you giving HDF_SD_ADDDATA for START, COUNT, and STRIDE?
What do you get when you type
          HELP,mydata
where 'mydata' represents the name of the field you're passing as the
 data argument to HDF_SD_ADDDATA?</blockquote>

<pre>-- 
George McCabe (CUofA)
NASA / Goddard Space Flight Center / Code 693 
Building 2, Room 151 / Greenbelt, MD 20771
voice: (301)286-8283, fax: (301)286-0212
george.mccabe@gsfc.nasa.gov</pre>
 </html>

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[Message index]

		Re: frustrated by hdf_sd_adddata By: Liam E. Gumley on Thu, 15 March 2001 10:52
		Re: frustrated by hdf_sd_adddata By: Pavel A. Romashkin on Thu, 15 March 2001 11:42
		Re: frustrated by hdf_sd_adddata By: John-David T. Smith on Thu, 15 March 2001 15:47
		Re: frustrated by hdf_sd_adddata By: George McCabe on Thu, 15 March 2001 10:15
		Re: frustrated by hdf_sd_adddata By: davidf on Thu, 15 March 2001 11:00
		Re: frustrated by hdf_sd_adddata By: George McCabe on Thu, 15 March 2001 08:18
		Re: frustrated by hdf_sd_adddata By: Pavel A. Romashkin on Thu, 15 March 2001 10:30
		Re: frustrated by hdf_sd_adddata By: George McCabe on Thu, 15 March 2001 06:13
		Re: frustrated by hdf_sd_adddata By: James Kuyper on Thu, 15 March 2001 07:50
		Re: frustrated by hdf_sd_adddata By: davidf on Wed, 14 March 2001 16:33
		Re: frustrated by hdf_sd_adddata By: James Kuyper on Thu, 15 March 2001 09:45
		Re: frustrated by hdf_sd_adddata By: Liam E. Gumley on Thu, 15 March 2001 10:57

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