[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[THREDDS #PXS-613580]: issue reading TDS file in OPeNDAP

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: [THREDDS #PXS-613580]: issue reading TDS file in OPeNDAP
  • Date: Mon, 25 Jul 2016 14:08:48 -0600
Ok, The problem appears to be this:
Lines like this appear in the .das:

    String WavesMonCfg.OutPath "C:\data\MVCO14\101003_ADCP767\wavesB\";

This is illegal in a DAS.
The spec says:
> 3.  String and URL: Strings and URLs are printed in US-ASCII.
> If the value of a string contains a space, it must be quoted
> using double quotes (").  If the value contains a double quote,
that MUST be escaped using the backslash (\) character.
The backslash character is represented as backslash-backslash (\\).

In particular,note that the above WavesMonCfg.OutPath example
ends with backslash followed by a double quote, so it looks like
the last double quote is part of the string constant.

Since this appears to be a thredds server, I will investigate why it is
not properly quoting strings.
I have moved this to a github issues here:
https://github.com/Unidata/thredds/issues/598


On 7/25/2016 11:25 AM, Montgomery, Ellyn wrote:
> New Ticket: issue reading TDS file in OPeNDAP
> 
> Hi folks-
> 
> I have tried to see why this file displays correctly in OPeNDAP (
> http://stellwagen.er.usgs.gov/thredds/dodsC/TSdata/MVCO_14/10103whp-cal.nc.html),
> but fails to allow access from ToolsUI or Matlab using the URL. The other
> files in the catalog work as expected, it's just something in the whp-cal.nc
> files that's causing trouble.  When viewed ncinfo, the file shows no
> attributes, but they're really there. Http download works fine, and ncdump
> shows there are attributes.  I can open and read variables and attributes
> from the *local* file in matlab, it only has problems when accessed through
> THREDDS (v 4.63).
> 
> This is a classic file.  I was suspicious of the NaNs in the dpsec minimum
> and maximum attributes, so I made a test file where the arrays with NaNs
> were changed to single elements: 0 for min and 2.14748368E8 for max.
> Unfortunately, I am unable to access the variables or attributes of the
> test file with matlab or toolsUI.
> 
> It seems like neither the netcdf-java nor the C interface can read the
> file. Any hints on what's toxic would be greatly appreciated.
> 
> Thanks for your insights.
> 

=Dennis Heimbigner
  Unidata


Ticket Details
===================
Ticket ID: PXS-613580
Department: Support THREDDS
Priority: Normal
Status: Closed
===================
NOTE: All email exchanges with Unidata User Support are recorded in the Unidata 
inquiry tracking system and then made publicly available through the web.  If 
you do not want to have your interactions made available in this way, you must 
let us know in each email you send to us.