diff --git a/.travis.yml b/.travis.yml
index 9e128b80a..682068dfd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,6 +17,10 @@ compiler: gcc
 # deprecated
 #sudo: required
 
+# turns off submodule fetching by default
+git:
+  submodules: false
+
 env:
   global:
     - FC=gfortran
diff --git a/m4 b/m4
index e490e14fb..f5b39ccf9 160000
--- a/m4
+++ b/m4
@@ -1 +1 @@
-Subproject commit e490e14fb13595428d39055304bcf0ee7ab94806
+Subproject commit f5b39ccf9ebf30a919f1a36ea05a3b53e84cd899
diff --git a/src/shared/read_parameter_file.F90 b/src/shared/read_parameter_file.F90
index 6b996c63b..7adaf30b0 100644
--- a/src/shared/read_parameter_file.F90
+++ b/src/shared/read_parameter_file.F90
@@ -245,11 +245,11 @@ subroutine read_parameter_file()
   call read_value_logical(OUTPUT_SEISMOS_SAC_BINARY, 'OUTPUT_SEISMOS_SAC_BINARY', ier)
   if (ier /= 0) stop 'an error occurred while reading the parameter file: OUTPUT_SEISMOS_SAC_BINARY'
   call read_value_logical(OUTPUT_SEISMOS_ASDF, 'OUTPUT_SEISMOS_ASDF', ier)
-  if (ier /= 0) stop 'an error occurred while reading the parameter file: OUTPUT_HDF5'
+  if (ier /= 0) stop 'an error occurred while reading the parameter file: OUTPUT_SEISMOS_ASDF'
   call read_value_logical(OUTPUT_SEISMOS_3D_ARRAY, 'OUTPUT_SEISMOS_3D_ARRAY', ier)
-  if (ier /= 0) stop 'an error occurred while reading the parameter file: OUTPUT_ASDF'
+  if (ier /= 0) stop 'an error occurred while reading the parameter file: OUTPUT_SEISMOS_3D_ARRAY'
   call read_value_logical(OUTPUT_SEISMOS_HDF5, 'OUTPUT_SEISMOS_HDF5', ier)
-  if (ier /= 0) stop 'an error occurred while reading the parameter file: OUTPUT_3D_ARRAY'
+  if (ier /= 0) stop 'an error occurred while reading the parameter file: OUTPUT_SEISMOS_HDF5'
   call read_value_logical(ROTATE_SEISMOGRAMS_RT, 'ROTATE_SEISMOGRAMS_RT', ier)
   if (ier /= 0) stop 'an error occurred while reading the parameter file: ROTATE_SEISMOGRAMS_RT'
   call read_value_logical(WRITE_SEISMOGRAMS_BY_MAIN, 'WRITE_SEISMOGRAMS_BY_MAIN', ier)