On Mon, Oct 17, 2016 at 11:15 AM, dmh@xxxxxxxx <dmh@xxxxxxxx> wrote: > If you are using the netcdf-c library (thru python) > then you may be able to get more info by prefixing the url > So you might have > [log][show=fetch]http://... > nice hint! but I don't see anything useful. I've enclosed the log. Maybe someone else can make some sense of it. > =Dennis Heimbigner > Unidata > > On 10/17/2016 10:59 AM, Chris Barker wrote: > >> >> >> On Mon, Oct 17, 2016 at 6:38 AM, Kyle Wilcox <kyle@xxxxxxxxxxxxxxxxxxxx >> <mailto:kyle@xxxxxxxxxxxxxxxxxxxx>> wrote: >> >> I can confirm. Looks like a libdap/hyrax issue? >> >> >> thanks -- does netcdf use libdap? >> >> but anyway, which one has the bug? One would need to see if the request >> was being made correctly -- and I haqv no idea how to do that :-( >> >> -CHB >> >> >> >> >> DAS seems to work just fine while DODS is returning: >> >> ... >> Error { >> code = -111; >> message = "libdap error transmitting DataDDS: Could not read the >> variable `ntimes'."; >> }; >> >> On Fri, Oct 14, 2016 at 5:43 PM Chris Barker <chris.barker@xxxxxxxx >> <mailto:chris.barker@xxxxxxxx>> wrote: >> >> Hi all, >> >> We're trying to use the netCDF4 python lib to access data on an >> what I thikn is a HYRAX server. It can create the Dataset object >> seemingly fine, and creates a variabel object fine -- but then >> gives me: >> >> RuntimeError: NetCDF: file not found >> >> when I try to extract some data from the variable. >> >> Noett hat this seems to work fien with PyDAP -- so maybe that >> means that it's a netcdf lib problem, rather than a HYRAX problem. >> >> But I have no idea how to debug this >> >> I'm using a pretty recent version of the netcdf lib: >> >> In [8]: netCDF4.getlibversion() >> Out[8]: u'4.4.1 of Aug 10 2016 18:32:53 $' >> >> though the failure is the same with older versions as well. (and >> both on Windows and OS-X so far...) >> >> I've enclosed a small python script that demonstrates the >> problem -- the problem url is in the script. >> >> Thanks for any hints! >> >> -CHB >> >> >> >> -- >> >> Christopher Barker, Ph.D. >> Oceanographer >> >> Emergency Response Division >> NOAA/NOS/OR&R (206) 526-6959 <tel:(206)%20526-6959> >> voice >> 7600 Sand Point Way NE (206) 526-6329 <tel:(206)%20526-6329> >> fax >> Seattle, WA 98115 (206) 526-6317 <tel:(206)%20526-6317> >> main reception >> >> Chris.Barker@xxxxxxxx <mailto:Chris.Barker@xxxxxxxx> >> _______________________________________________ >> NOTE: All exchanges posted to Unidata maintained email lists are >> recorded in the Unidata inquiry tracking system and made publicly >> available through the web. Users who post to any of the lists we >> maintain are reminded to remove any personal information that they >> do not want to be made public. >> >> >> netcdfgroup mailing list >> netcdfgroup@xxxxxxxxxxxxxxxx <mailto:netcdfgroup@xxxxxxxxxxxxxxxx >> > >> For list information or to unsubscribe, visit: >> http://www.unidata.ucar.edu/mailing_lists/ >> <http://www.unidata.ucar.edu/mailing_lists/> >> >> >> >> >> -- >> >> Christopher Barker, Ph.D. >> Oceanographer >> >> Emergency Response Division >> NOAA/NOS/OR&R (206) 526-6959 voice >> 7600 Sand Point Way NE (206) 526-6329 fax >> Seattle, WA 98115 (206) 526-6317 main reception >> >> Chris.Barker@xxxxxxxx <mailto:Chris.Barker@xxxxxxxx> >> >> >> _______________________________________________ >> NOTE: All exchanges posted to Unidata maintained email lists are >> recorded in the Unidata inquiry tracking system and made publicly >> available through the web. Users who post to any of the lists we >> maintain are reminded to remove any personal information that they >> do not want to be made public. >> >> >> netcdfgroup mailing list >> netcdfgroup@xxxxxxxxxxxxxxxx >> For list information or to unsubscribe, visit: >> http://www.unidata.ucar.edu/mailing_lists/ >> >> -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R (206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception Chris.Barker@xxxxxxxx
Attachment:
hyrax_fail.log
Description: Binary data
# Example of failed requet from a HYRAX server
from netCDF4 import Dataset
nc =
Dataset('[log][show=fetch]http://ingria.coas.oregonstate.edu:80/opendap/aggregation/ocean_time_aggregation.ncml')
print("Dataset loaded OK")
u = nc.variables['u']
print("Successfully Extracted a varaible object:")
print(u)
u_shape = u.shape # this works ok
print("The variable object is seemingly valid:")
print("the shape is %s" % (u_shape,))
print("but I can't extract the actual data")
u_data = u[0, 0, 0:10, 0:10:] # this does not work--"RuntimeError: NetCDF:
file not found"
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