# unable to write source files **URL:** \ **Category:** User Support\ **Created:** [May 31, 2017, 10:35pm UTC](https://openmc.discourse.group/t/unable-to-write-source-files/273 "2017-05-31T22:35:27Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Jilang\_Miao](https://avatars.discourse-cdn.com/v4/letter/j/6f9a4e/32.png) [@Jilang\_Miao](https://openmc.discourse.group/u/Jilang_Miao)\ **Post date:** [May 31, 2017, 10:35pm UTC](https://openmc.discourse.group/t/unable-to-write-source-files/273/1 "2017-05-31T22:35:27Z")
Hi All, I have trouble writing source files using the \ tag. pasted below is my settings.xml. \eigenvalue\ 5 1 1080 \ 1 2 3 4 5 6 7 8 9 10 \ \ 3 true xxx \ It turns out sourcefile will not be written. And if i print source\_write, it is “false” no matter what I put in xxx (xxx = true, 1, .true. …). The value is “false” since get\_node\_value(node\_sp, “write”). Thanks! Jilang ---
**Author:** ![paulromano](https://yyz2.discourse-cdn.com/free1/user_avatar/openmc.discourse.group/paulromano/32/486_2.png) [@paulromano](https://openmc.discourse.group/u/paulromano)\ **Post date:** [June 1, 2017, 2:10am UTC](https://openmc.discourse.group/t/unable-to-write-source-files/273/2 "2017-06-01T02:10:13Z")
Hi Jilang, What version of OpenMC and compiler are you using? I’m not able to reproduce this problem so far. thanks, Paul ---
**Author:** ![Jilang\_Miao](https://avatars.discourse-cdn.com/v4/letter/j/6f9a4e/32.png) [@Jilang\_Miao](https://openmc.discourse.group/u/Jilang_Miao)\ **Post date:** [June 1, 2017, 2:19am UTC](https://openmc.discourse.group/t/unable-to-write-source-files/273/3 "2017-06-01T02:19:13Z")
Hi Paul, The last commit from upstream is 71abc38d852c7ea07c8c6280d8db4c3c6326d530 Thanks! Jilang ---
**Author:** ![paulromano](https://yyz2.discourse-cdn.com/free1/user_avatar/openmc.discourse.group/paulromano/32/486_2.png) [@paulromano](https://openmc.discourse.group/u/paulromano)\ **Post date:** [June 1, 2017, 11:34am UTC](https://openmc.discourse.group/t/unable-to-write-source-files/273/4 "2017-06-01T11:34:19Z")
Even using the same commit, I am not able to reproduce the behavior you are seeing. What compilers are you using? ---
**Author:** ![Jilang\_Miao](https://avatars.discourse-cdn.com/v4/letter/j/6f9a4e/32.png) [@Jilang\_Miao](https://openmc.discourse.group/u/Jilang_Miao)\ **Post date:** [June 1, 2017, 12:58pm UTC](https://openmc.discourse.group/t/unable-to-write-source-files/273/5 "2017-06-01T12:58:08Z")
Below are the output of cmake … – The Fortran compiler identification is GNU – The C compiler identification is GNU 6.2.0 – The CXX compiler identification is GNU 6.2.0 – Check for working Fortran compiler: /home/software/nse/mpich/gnu-6.2.0/3.2/bin/mpif90 – Check for working Fortran compiler: /home/software/nse/mpich/gnu-6.2.0/3.2/bin/mpif90 – works – Detecting Fortran compiler ABI info – Detecting Fortran compiler ABI info - done – Checking whether /home/software/nse/mpich/gnu-6.2.0/3.2/bin/mpif90 supports Fortran 90 – Checking whether /home/software/nse/mpich/gnu-6.2.0/3.2/bin/mpif90 supports Fortran 90 – yes – Check for working C compiler: /home/software/nse/mpich/gnu-6.2.0/3.2/bin/mpicc – Check for working C compiler: /home/software/nse/mpich/gnu-6.2.0/3.2/bin/mpicc – works – Detecting C compiler ABI info – Detecting C compiler ABI info - done – Check for working CXX compiler: /home/software/gcc/6.2.0/bin/c++ – Check for working CXX compiler: /home/software/gcc/6.2.0/bin/c++ – works – Detecting CXX compiler ABI info – Detecting CXX compiler ABI info - done – Detected MPI wrapper: /home/software/nse/mpich/gnu-6.2.0/3.2/bin/mpif90 – Found HDF5: /home/software/nse/hdf5/gnu-6.2.0/1.8.17/lib/libhdf5hl\_fortran.so;/home/software/nse/hdf5/gnu-6.2.0/1.8.17/lib/libhdf5\_hl.so;/home/software/nse/hdf5/gnu-6.2.0/1.8.17/lib/libhdf5\_fortran.so;/home/software/nse/hdf5/gnu-6.2.0/1.8.17/lib/libhdf5.so;-lz;-ldl;-lm (found version “1.8.17”) – Fortran flags: -cpp;-std=f2008;-fbacktrace;-O2;-fopenmp – C flags: -cpp;-std=c99;-O2;-fopenmp – Linker flags: -fopenmp – Found PythonInterp: /home/jlmiao/miniconda3/bin/python (found version “3.6”) – Configuring done – Generating done – Build files have been written to: /home/jlmiao/source/openmc/build-test Thanks! Jilang ---
**Author:** ![paulromano](https://yyz2.discourse-cdn.com/free1/user_avatar/openmc.discourse.group/paulromano/32/486_2.png) [@paulromano](https://openmc.discourse.group/u/paulromano)\ **Post date:** [June 1, 2017, 2:56pm UTC](https://openmc.discourse.group/t/unable-to-write-source-files/273/6 "2017-06-01T14:56:54Z")
I don’t see anything obviously wrong. Would you be comfortable sharing your full set of input files so that I can try to run them directly? ---
**Author:** ![Jilang\_Miao](https://avatars.discourse-cdn.com/v4/letter/j/6f9a4e/32.png) [@Jilang\_Miao](https://openmc.discourse.group/u/Jilang_Miao)\ **Post date:** [June 1, 2017, 4:42pm UTC](https://openmc.discourse.group/t/unable-to-write-source-files/273/7 "2017-06-01T16:42:56Z")
I’ve pasted the simplified input files below. I also made changes to openmc ([https://github.com/mjlong/openmc](https://github.com/mjlong/openmc)) on branch “mjl-delay”. I added the 3 lines below in input\_xml.F90. It will print source\_write as “F”. And if I force it to be true, I’ll have runtime error. call get\_node\_value(node\_sp, “write”, source\_write) !source\_write = .true. write(_,_) source\_write ---
**Author:** ![paulromano](https://yyz2.discourse-cdn.com/free1/user_avatar/openmc.discourse.group/paulromano/32/486_2.png) [@paulromano](https://openmc.discourse.group/u/paulromano)\ **Post date:** [June 1, 2017, 8:42pm UTC](https://openmc.discourse.group/t/unable-to-write-source-files/273/8 "2017-06-01T20:42:08Z")
Figured it out – this is actually caused by our switch to the pugixml XML parser. When variables are expected to be booleans like true or false, we use pugixml’s xml\_attribute::as\_bool() and xml\_text::as\_bool() methods which require that the value passed does not have extraneous whitespace. If you remove the outer whitespace in the and tags, your example should work correctly. Best, Paul ---
**Author:** ![Jilang\_Miao](https://avatars.discourse-cdn.com/v4/letter/j/6f9a4e/32.png) [@Jilang\_Miao](https://openmc.discourse.group/u/Jilang_Miao)\ **Post date:** [June 1, 2017, 9:12pm UTC](https://openmc.discourse.group/t/unable-to-write-source-files/273/9 "2017-06-01T21:12:43Z")
Thanks! source\_write can be correctly set now.