Hi I upgraded my system to OpenSUSE 11.3. I kept 'iyt' and 'enzo' in '/usr/local' while I only upgraded '/' while '/' and '/usr/local' are two different partitions. Now Enzo is working while iyt gives following error. $> iyt Warning! ***HDF5 library version mismatched error*** The HDF5 header files used to compile this application do not match the version used by the HDF5 library to which this application is linked. Data corruption or segmentation faults may occur if the application continues. This can happen when an application was compiled by one version of HDF5 but linked with a different version of static or shared HDF5 library. You should recompile the application or check your shared library related settings such as 'LD_LIBRARY_PATH'. You can, at your own risk, disable this warning by setting the environment variable 'HDF5_DISABLE_VERSION_CHECK' to a value of '1'. Setting it to 2 or higher will suppress the warning messages totally. Headers are 1.8.5, library is 1.8.4 SUMMARY OF THE HDF5 CONFIGURATION ================================= General Information: ------------------- HDF5 Version: 1.8.4-patch1 Configured on: Sat May 29 02:41:00 IST 2010 Configured by: root@Pakudidi Configure mode: production Host system: x86_64-unknown-linux-gnu Uname information: Linux Pakudidi 2.6.31-rc9-7-default #1 SMP 2009-09-08 18:49:15 +0200 x86_64 x86_64 x86_64 GNU/Linux Byte sex: little-endian Libraries: Installation point: /usr/local Compiling Options: ------------------ Compilation Mode: production C Compiler: /usr/bin/gcc (gcc-4.4.1) CFLAGS: H5_CFLAGS: -std=c99 -pedantic -Wall -Wextra -Wundef -Wshadow -Wpointer-arith -Wbad-function-cast -Wcast-qual -Wcast-align -Wwrite-strings -Wconversion -Waggregate-return -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -Wnested-externs -Winline -Wno-long-long -Wfloat-equal -Wmissing-format-attribute -Wmissing-noreturn -Wpacked -Wdisabled-optimization -Wformat=2 -Wunreachable-code -Wendif-labels -Wdeclaration-after-statement -Wold-style-definition -Winvalid-pch -Wvariadic-macros -Wnonnull -Winit-self -Wmissing-include-dirs -Wswitch-default -Wswitch-enum -Wunused-macros -Wunsafe-loop-optimizations -Wc++-compat -Wstrict-overflow -Wlogical-op -Wlarger-than=2048 -Wvla -Wsync-nand -Wframe-larger-than=16384 -Wpacked-bitfield-compat -O0 -fomit-frame-pointer -finline-functions AM_CFLAGS: CPPFLAGS: H5_CPPFLAGS: -D_POSIX_SOURCE -DNDEBUG -UH5_DEBUG_API AM_CPPFLAGS: -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_BSD_SOURCE Shared Libraries: yes Static Libraries: yes Statically Linked Executables: no LDFLAGS: AM_LDFLAGS: Extra libraries: -lz -lm Archiver: ar Ranlib: ranlib Debugged Packages: API Tracing: no Languages: ---------- Fortran: yes Fortran Compiler: ifort Fortran Flags: H5 Fortran Flags: -O3 AM Fortran Flags: -fPIC C++: yes C++ Compiler: g++ C++ Flags: H5 C++ Flags: AM C++ Flags: Features: --------- Parallel HDF5: no High Level library: yes Threadsafety: no Default API Mapping: v18 With Deprecated Public Symbols: yes I/O filters (external): deflate(zlib) I/O filters (internal): shuffle,fletcher32,nbit,scaleoffset MPE: no Direct VFD: no dmalloc: no Clear file buffers before write: yes Using memory checker: no Function Stack Tracing: no GPFS: no Strict File Format Checks: no Optimization Instrumentation: no Linux Large File Support (LFS): yes Bye... Abort $> Can you help me how to proceed? Thanks and Regs Abhijit