diff --git a/lessons/training/Lesson-1-compile.ipynb b/lessons/training/Lesson-1-compile.ipynb
index 5b31905..0ae9197 100755
--- a/lessons/training/Lesson-1-compile.ipynb
+++ b/lessons/training/Lesson-1-compile.ipynb
@@ -74,7 +74,6 @@
     "| HYDRO_D | 0=Off, 1=On | Enhanced diagnostic output for debugging |\n",
     "| SPATIAL_SOIL | 0=Off, 1=On | Spatially distributed parameters for Noah-MP. This allows Noah-MP to use spatially distributed parameters for the land surface model rather than parameter based upon soil class and land use category look up tables. See Section 5.3.1 of the [Technical Description](https://ral.ucar.edu/projects/wrf_hydro/technical-description-user-guide) |\n",
     "| WRF_HYDRO_RAPID | 0=Off, 1=On | Coupling with the RAPID routing model. This option is not currently supported.  |\n",
-    "| WRFIO_NCD_LARGE_FILE_SUPPORT | 0=Off, 1=On | Large netcdf file support. Allow netCDF I/O of files larger than 2GB. |\n",
     "| NCEP_WCOSS | 0=Off, 1=On | WCOSS file units. Do not use unless working on the WCOSS machines. |\n",
     "| WRF_HYDRO_NUDGING | 0=Off, 1=On | Streamflow nudging. Enable the streamflow nudging routines for Muskingum-Cunge Routing. See Section 3.6.2. of the [Technical Description](https://ral.ucar.edu/projects/wrf_hydro/technical-description-user-guide) |\n",
     "\n",
@@ -164,9 +163,6 @@
     "# RAPID model: 0=Off, 1=On.\n",
     "export WRF_HYDRO_RAPID=0\n",
     "\n",
-    "# Large netcdf file support: 0=Off, 1=On.\n",
-    "export WRFIO_NCD_LARGE_FILE_SUPPORT=1\n",
-    "\n",
     "# WCOSS file units: 0=Off, 1=On. \n",
     "export NCEP_WCOSS=0\n",
     "\n",
diff --git a/lessons/training/Lesson-4-run-options.ipynb b/lessons/training/Lesson-4-run-options.ipynb
index 396d10c..a9ef37f 100755
--- a/lessons/training/Lesson-4-run-options.ipynb
+++ b/lessons/training/Lesson-4-run-options.ipynb
@@ -80,9 +80,6 @@
     "# RAPID model: 0=Off, 1=On.\n",
     "export WRF_HYDRO_RAPID=0\n",
     "\n",
-    "# Large netcdf file support: 0=Off, 1=On.\n",
-    "export WRFIO_NCD_LARGE_FILE_SUPPORT=1\n",
-    "\n",
     "# WCOSS file units: 0=Off, 1=On. \n",
     "export NCEP_WCOSS=0\n",
     "\n",