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- Subject: Re: [netCDF #MCW-760344]: Strange behaviour of nc_put_var
- Date: Thu, 6 Sep 2012 11:22:28 +0200
Hi Russ, thank you very much for your help. I have used the newer version 4.2 of the library and now it works perfectly. And thanks for the advice that the C library is also necessary to compile the fortran variant. Actually I have tried to compile the fortran version before but always without the C library, so I eventually gave up and went back to 4.1.3. Perhaps it would be a good idea to explicitly point out on the Netcdf web site that the C library is required for the fortran library. For a newcomer like me that is not that obvious. Likely that I have overlooked something, but I didn't find anything on the your download web site nor in the supplied README in the fortran package. Only after I have downloaded the C version I found a corresponding hint in the INSTALL file. It might be a good idea to include such a file also in the fortran-4.2 package. Anyway, I greatly appreciate your prompt support. Best regards, Jan >> Full Name: Jan Aschmann >> Email Address: address@hidden >> Organization: University of Bremen, Institute of Environmental Physics >> Package Version: 4.1.3 >> Operating System: AIX 6.1 >> Hardware: IBM PowerPC 64-Bit >> Description of problem: >> >> Dear Sir or Madam, >> >> I have encountered a strange problem when trying to write an 2D integer >> array to a netcdf-file (see attached code). I use the 4.1.3 library on >> an IBM AIX 64-bit machine, compiled either completely with gcc/gfortran >> or xlC/xlf. In both cases, if I compile and run the attached program I >> get this kind of strange output (xlf version): >> >> xlf95_r -q64 -O0 -qstrict -o test test.f90 >> -L/hb/jaschman/netcdf4_withHDF5/lib -lnetcdff -lnetcdf >> -I/hb/jaschman/netcdf4_withHDF5/include -L/hb/jaschman/HDF5/lib -lhdf5_hl >> -lhdf5 ** test === End of Compilation 1 === >> 1501-510 Compilation successful for file test.f90. >> jaschman@odin:~> ./test >> write out to file... .nc >> 17 17 0 778986336 >> >> Apparently, the last line comes out of the nf90_put_var subroutine, >> representing a memory violation. This occurs also if I use gfortran with >> a correspondingly compiled netcdf-library. >> >> Have I done something wrong in compiling the library in the first place? I >> have used the following flags: export CC=xlc_r >> export CXX=xlC_r >> export F77=xlf_r >> export FC=xlf95_r >> export CFLAGS='-q64 -O3 -qstrict -qarch=auto -qtune=auto' >> export CXXFLAGS='-q64 -O3 -qstrict -qarch=auto -qtune=auto' >> export FFLAGS='-q64 -O3 -qstrict -qarch=auto -qtune=auto' >> export FCFLAGS='-qsuffix=f=f90 -q64 -O3 -qstrict -qarch=auto -qtune=auto' >> export CPPFLAGS='-DIBMR2Fortran' >> export ARFLAGS='-X64 -cru' >> export NMFLAGS=-X32_64 >> >> My configure: >> ./configure --prefix=/hb/jaschman/netcdf4_withHDF5 >> --with-hdf5=/hb/jaschman/hdf5 --disable-dap --disable-shared >> >> Note that I got the same behaviour if I disabled netcdf4 features >> (i.e. compile without HDF5). The abnormal behaviour vanishes if I use >> another data type as integer for the variable int_date or if I add >> another dimension. Strange enough the resulting nc file is always >> correctly created, whether the mysterious output appears or not. >> Perhaps you can help me out in this case. > >Hi Jan, > >You did nothing wrong, the problem is a debugging statement that was >unfortunatelyly left in the netCDF-4.1.3 Fortran-90 code, as described here: > > http://www.unidata.ucar.edu/support/help/MailArchives/netcdf/msg10490.html > >You could just remove the debugging statement and rebuild the library, or >you could upgrade to the latest version of the netCDF C library (4.2.1.1) >and Fortran library (4.2). They are not bundled together now, you need >to first build and install the C library, then build and install the Fortran >library, specifying where the C library was installed. This is described >here: > > http://www.unidata.ucar.edu/software/netcdf/docs/building.html > >I just tried it out on your example, and it worked fine. > >--Russ > >Russ Rew UCAR Unidata Program >address@hidden http://www.unidata.ucar.edu > > > >Ticket Details >=================== >Ticket ID: MCW-760344 >Department: Support netCDF >Priority: Normal >Status: Closed ________________________________________ Dr. Jan Aschmann Institute of Environmental Physics (IUP) Atmospheric Modeling Group http://www.iup.uni-bremen.de/atmospheric/ phone: ++49-(0)421-218-62114 email: address@hidden Room: U3220 University of Bremen (FB1) P.O. Box 330440 Otto-Hahn-Allee 1 28359 Bremen Germany
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