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HDF_SD_START: Invalid HDF file or filename: problem related to network issues [message #86278]

Tue, 22 October 2013 11:06

Robert Levy
Messages: 1
Registered: October 2013

Junior Member

Hi all,
I am a group newbie, so i apologize if a solution exists but I didn't find.

Anyway, I am running a giant script to read thousands of MODIS HDF data files, which the files are located on a LVES mount (data are virtually mounted through a network).

So the problem seems to be that there are occasional network "blips" that happen. For example, I run these command:

1) determine that the file exists and is a proper HDF file
fileHandle = HDF_OPEN(Filename, /READ )
IF fileHandle LT 1 THEN BEGIN
errorLevel = 1
Return, errorLevel
ENDIF
HDF_CLOSE, fileHandle

2) Then I go and actually open the file:

hdfid = HDF_SD_START(Filename, /READ)

This is where the code bombs and gives me:
HDF_SD_START: Invalid HDF file or filename

and stops my whole code. This file exists and is a perfectly fine file.

Note that this may happen after the code is running for days (opening and closing files). If I try a second later, it works fine. Is there any way to have HDF_SD_START exit gracefully, and return an error code, rather than stop with error message? Then I could know it is a network problem and try again a few seconds later.

Thanks for any ideas.

-Rob

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[Message index]

		HDF_SD_START: Invalid HDF file or filename: problem related to network issues By: Robert Levy on Tue, 22 October 2013 11:06
		Re: HDF_SD_START: Invalid HDF file or filename: problem related to network issues By: Andy Sayer on Tue, 22 October 2013 11:37
		Re: HDF_SD_START: Invalid HDF file or filename: problem related to network issues By: David Fanning on Tue, 22 October 2013 11:44
		Re: HDF_SD_START: Invalid HDF file or filename: problem related to network issues By: Carsten Lechte on Wed, 23 October 2013 02:05
		Re: HDF_SD_START: Invalid HDF file or filename: problem related to network issues By: xin.xi30 on Wed, 20 January 2016 13:33

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