[netCDF #IWC-920640]: posixio.c error in

Hi Mark,

Just to jump in, I have a couple of questions of my own.  First, are you able 
to try this with a newer version of netcdf?  As mentioned in the email thread 
you reference, there were a number of related bugfixes in netcdf-c 4.3.2 that I 
suspect may have addressed the issue.

Second, do you see the same behavior if you run the program on the internal 
hard-drive instead of the USB3-connected external hard drive?

Thanks!

-Ward

> Dear NetCDF support,
> 
> I am consistently getting the following assertion error in the px_pgout 
> routine in posixio:
> 
> > Assertion failed: (*posp == OFF_NONE || *posp == lseek(nciop->fd, 0, 
> > SEEK_CUR)), function px_pgout, file posixio.c, line 232.
> 
> 
> I am accessing NetCDF 4.3.0 in IDL version 8.3 on a Mac Mini running OS X 
> 10.9.5.  The attached program called test_netcdf.pro consistently reproduces 
> the error.  The program creates a NetCDF file on a USB 3.0-connected external 
> hard drive over and over and over again, printing a "+" sign to the terminal 
> for every 1000 files created.  I wrote this program to diagnose a separate 
> error with the "NCDF_CONTROL, id, /ENDEF" procedure in IDL (note the CATCH 
> statements that are designed to catch an NC_ERROR=-31 problem in that 
> procedure).  The CATCH block is a successful workaround for the endef issue, 
> but I still get the error in px_pgout.  I'm including below output from a 
> typical run of the program (this may take a few hours to run, but it will 
> always produce the assertion failure on my machine).  Note that the 
> "error_count = 1" line occurs whenever the CATCH is tripped, but the 
> important part is that the program always ends catastrophically with the 
> assertion error, crashing I
 DL and dumping me back out to the UNIX prompt.  I've also included information 
below about the version of IDL, NetCDF, and hardware that I'm using.
> 
> This error seems identical to a problem identified several years ago: 
> http://www.unidata.ucar.edu/mailing_lists/archives/netcdfgroup/2011/msg00108.html,
>  and it seems there was a similar problem reported for px_pgin very recently: 
> http://www.unidata.ucar.edu/support/help/MailArchives/netcdf/msg12675.html
> 
> Is there any solution for this problem?  Thanks in advance for your help with 
> this.
> 
> All the best,
> Mark
> 
> Mark Baumgartner
> Associate Scientist
> Biology Department
> Woods Hole Oceanographic Institution
> MS #33, Redfield 256
> Woods Hole, MA 02543
> address@hidden
> www.whoi.edu/sites/mbaumgartner
> (508)289-2678 phone
> (508)457-2134 fax
> 
> 
> 
> 
> > IDL Version 8.3, Mac OS X (darwin x86_64 m64). (c) 2013, Exelis Visual 
> > Information Solutions, Inc.
> > Installation number: 245610.
> > Licensed for use by: Woods Hole Oceanographic Institution
> >
> > IDL> .run test_netcdf
> > % Compiled module: TEST_NETCDF.
> > IDL> test_netcdf
> > % Loaded DLM: NCDF.
> > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> > error count = 1 (      229403)
> > +++++++++++++++++
> > error count = 1 (      123163)
> > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> > error count = 1 (      113457)
> > +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> > error count = 1 (      101881)
> > +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> > error count = 1 (       97787)
> > +++++++++++++++
> > error count = 1 (       83996)
> > ++++++++++
> > error count = 1 (       73407)
> > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> > error count = 1 (       81884)
> > +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> > error count = 1 (       89847)
> > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++Assertion
> >  failed: (*posp == OFF_NONE || *posp == lseek(nciop->fd, 0, SEEK_CUR)), 
> > function px_pgout, file posixio.c, line 232.
> > Abort
> 
> 
> > IDL> help, /struct, !version
> > ** Structure !VERSION, 8 tags, length=104, data length=100:
> >    ARCH            STRING    'x86_64'
> >    OS              STRING    'darwin'
> >    OS_FAMILY       STRING    'unix'
> >    OS_NAME         STRING    'Mac OS X'
> >    RELEASE         STRING    '8.3'
> >    BUILD_DATE      STRING    'Nov 15 2013'
> >    MEMORY_BITS     INT             64
> >    FILE_OFFSET_BITS
> >                    INT             64
> 
> > ** NCDF - IDL NetCDF support (not loaded)
> >     Version: 4.3.0, Build Date: NOV 15 2013, Source: Exelis Visual 
> > Information Solutions, Inc.
> >     Path: /Applications/exelis/idl/bin/bin.darwin.x86_64/idl_netcdf.so
> 
> 
> 
> 
> 
> 
> 
> 


Ticket Details
===================
Ticket ID: IWC-920640
Department: Support netCDF
Priority: Normal
Status: Closed