[netcdfgroup] Segmentation fault using Compound-type in NetCDF4 files

• To: "netcdfgroup@xxxxxxxxxxxxxxxx" <netcdfgroup@xxxxxxxxxxxxxxxx>
• Subject: [netcdfgroup] Segmentation fault using Compound-type in NetCDF4 files
• From: Denuder Marco <MDenuder@xxxxxxxxxxxxxxxxxxxx>
• Date: Tue, 6 Mar 2012 15:06:18 +0100

Hi everyone!
Recently I created a program to read .csv files into NetCDF4 files. The code 
did not show any error-messages while compiling and the NetCDF4 files have 
always been created. However, if I try to retrieve the data, I get a 
"segmentation fault" due to the built-in compound dimension/variable "time". 
Does anybody know how I can fix this? Thx!

Further information:

·         The program was written on Python 3.2 using Python interface to 
netCDF version 4 library 
(http://netcdf4-python.googlecode.com/svn/trunk/docs/netCDF4-module.html )

·         To retrieve the data I used:

o   Command "ncdump" from the NetCdf4 library on Linux ,written in C 
(http://linux.die.net/man/1/ncdump)

o   Command "ncdump -x" from the NetCdf4 library on Linux ,written in C

o   Command "ncks" from the NCO (NetCDF Operator)  library using Cygwin on 
Windows (http://nco.sourceforge.net/ )

·         Error Messages while retrieving the data:

o   On Linux "ncdump":

§  "segmentation fault"

o   On Linux "ncdump -x":

§  "ncdump: prim_type_name: bad type 32"

o   On Windows "ncks":

§  "nco_dfl_case_nc_type_err(): ERROR switch(nctype) statement fell through fo 
default case, which is illegal. Not handling the default case causes gc to emit 
warnings when cimpiling NCO with the NETCDF2_ONLY token (because nctype 
definition is braindead in netCDF2.x). Exiting... nco_err_exit(): ERR Short 
NCO-generated message (usually name of function that triggered error): 
nco_dfl_case_nc_type_err() nco_err_exit(): ERROR Error code is 0. This 
indicates an error occurred outside of the netCDF layer, i.e., in NCO code or 
in a system call. Nco_err_exit(): ERROR NCO will now exit with system call 
abort() 193 [sig] ncks 692 open_stackdumpfile: Dumping stack trace to 
ncks.exe.stackdump"

·         The compound "time" is defined as a NetCDF compound type consisting 
of two int64 components: seconds and microseconds. it is read-in from a numpy 
compound type as described on( 
http://netcdf4-python.googlecode.com/svn/trunk/docs/netCDF4-module.html under 
9) )


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