c++ - MSMPI Write in file not work correctly -


i want write program in mpi, when program run debug out mpiexec.exe (in cl.exe) works correctly, when run in mpiexec.exe, program blocked mpiexec.exe , never terminated until forced close. 

  void writeinfile(char * str  ,bool needtonewline )   {     mpi_status status;     mpi_file file;         //add newline in str     int newcharlenght , charlenght ;     charlenght  =strlen(str);     newcharlenght = charlenght + 1;      char * newstr = (char  *) malloc(newcharlenght);     newstr[0] =needtonewline ?  '\n' : ' ';      for(int nlc = 1 ; nlc < newcharlenght ; nlc++ )          newstr[nlc] = str[nlc-1];       mpi_file_open(mpi_comm_world , file_path  ,  mpi_mode_rdwr  | mpi_mode_create  , mpi_info_null ,&file);      mpi_file_seek(file , 0 , mpi_seek_end);      mpi_file_write(file , newstr , newcharlenght , mpi_character , &status);      mpi_file_close(&file);       free(newstr);    }

how can fix this?


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