=== If no file names and line numbers are shown below, one can run addr2line -Cpfie my_exefile my_line_address to convert `my_line_address` (e.g., 0x4a6b) into file name and line number. Or one can use amrex/Tools/Backtrace/parse_bt.py. === Please note that the line number reported by addr2line may not be accurate. One can use readelf -wl my_exefile | grep my_line_address' to find out the offset for that line. 0: ./Castro1d.gnu.DEBUG.MPI.ex(+0x274044) [0x55f7a11a7044] amrex::BLBackTrace::print_backtrace_info(_IO_FILE*) /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:163:29 1: ./Castro1d.gnu.DEBUG.MPI.ex(+0x273c8e) [0x55f7a11a6c8e] amrex::BLBackTrace::handler(int) /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:71:8 2: /lib64/libc.so.6(+0x3c6b0) [0x7f0cfeff26b0] __restore_rt ??:0 3: ./Castro1d.gnu.DEBUG.MPI.ex(+0x10b568) [0x55f7a103e568] std::__uniq_ptr_impl >::_M_ptr() const /usr/include/c++/9/bits/unique_ptr.h:154:58 4: ./Castro1d.gnu.DEBUG.MPI.ex(+0x10b4b8) [0x55f7a103e4b8] std::unique_ptr >::get() const /usr/include/c++/9/bits/unique_ptr.h:353:31 5: ./Castro1d.gnu.DEBUG.MPI.ex(+0x10b2bc) [0x55f7a103e2bc] std::unique_ptr >::operator bool() const /usr/include/c++/9/bits/unique_ptr.h:367:45 6: ./Castro1d.gnu.DEBUG.MPI.ex(+0x1044e7) [0x55f7a10374e7] RadSolve::levelBndry(RadBndry&) /raid/testing/castro-gfortran/Castro//Source/radiation/RadSolve.cpp:124:3 7: ./Castro1d.gnu.DEBUG.MPI.ex(+0x114e55) [0x55f7a1047e55] Radiation::single_group_update(int, int, int) /raid/testing/castro-gfortran/Castro//Source/radiation/SGRadSolver.cpp:148:7 8: ./Castro1d.gnu.DEBUG.MPI.ex(+0x127e36) [0x55f7a105ae36] Castro::final_radiation_call(amrex::MultiFab&, int, int) /raid/testing/castro-gfortran/Castro//Source/radiation/Castro_radiation.cpp:49:36 9: ./Castro1d.gnu.DEBUG.MPI.ex(+0x3e099) [0x55f7a0f71099] Castro::advance(double, double, int, int) /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:187:21 10: ./Castro1d.gnu.DEBUG.MPI.ex(+0x2dba1d) [0x55f7a120ea1d] amrex::Amr::timeStep(int, double, int, int, double) /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2112:44 11: ./Castro1d.gnu.DEBUG.MPI.ex(+0x2dc25d) [0x55f7a120f25d] amrex::Amr::coarseTimeStep(double) /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2439:26 12: ./Castro1d.gnu.DEBUG.MPI.ex(+0x6b668) [0x55f7a0f9e668] main /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:152:5 13: /lib64/libc.so.6(__libc_start_main+0xf3) [0x7f0cfefdd1a3] __libc_start_main ??:0 14: ./Castro1d.gnu.DEBUG.MPI.ex(+0x14c9e) [0x55f7a0f47c9e] _start ??:0