diff --git a/Convert_Matlab/inst_eddies_v6.py b/Convert_Matlab/inst_eddies_v6.py
index 5857b835a9257716af6166bc051ab66ef5e1a66b..4fad994aa78986892e5df70c36a2b1e0873ece7a 100755
--- a/Convert_Matlab/inst_eddies_v6.py
+++ b/Convert_Matlab/inst_eddies_v6.py
@@ -116,28 +116,28 @@ else:
     final_date = my_date
 
 factories = [dict(writers = {}, cell_name = "Anticyclonic_Cell",
-                  cyclone = False, SHP_coll = "SHPC_anti"),
+                  cyclone = False, SHPC = "SHPC_anti"),
              dict(writers = {}, cell_name = "Cyclonic_Cell", cyclone = True,
-                  SHP_coll = "SHPC_cyclo")]
+                  SHPC = "SHPC_cyclo")]
 
 for f in factories:
-    file = path.join(f["SHP_coll"], "extremum")
+    file = path.join(f["SHPC"], "extremum")
     f["writers"]["extr"] = shapefile.Writer(file, shapeType = shapefile.POINT)
     
-    file = path.join(f["SHP_coll"], "centroid")
+    file = path.join(f["SHPC"], "centroid")
     f["writers"]["centroid"] = shapefile.Writer(file,
                                                 shapeType = shapefile.POINT)
     
-    file = path.join(f["SHP_coll"], "outermost_contour")
+    file = path.join(f["SHPC"], "outermost_contour")
     f["writers"]["outer"] = shapefile.Writer(file,
                                              shapeType = shapefile.POLYGON)
     
-    file = path.join(f["SHP_coll"], "max_speed_contour")
+    file = path.join(f["SHPC"], "max_speed_contour")
     f["writers"]["max_speed"] = shapefile.Writer(file,
                                                  shapeType = shapefile.POLYGON)
     
     define_fields(f["writers"])
-    file = path.join(f["SHP_coll"], "ishape_last.txt")
+    file = path.join(f["SHPC"], "ishape_last.txt")
     f["writers"]["ishape_last"] = open(file, "w")
     
 
@@ -179,6 +179,6 @@ nml["grid_nml"] = dict(corner_deg = [matlab_data["X"][0], matlab_data["Y"][0]],
                                    matlab_data["Y"][1] - matlab_data["Y"][0]])
 
 for f in factories:
-    file = path.join(f["SHP_coll"], "grid_nml.txt")
+    file = path.join(f["SHPC"], "grid_nml.txt")
     nml.write(file, force = True)
     for k, v in f["writers"].items(): v.close()
diff --git a/Inst_eddies/Analysis/distribution_function.py b/Inst_eddies/Analysis/distribution_function.py
index bb384fb77cbe674e3c153d6776f67e8d611051a6..3908e1c074260a11b9b45e6a9ca1dafa476279d6 100755
--- a/Inst_eddies/Analysis/distribution_function.py
+++ b/Inst_eddies/Analysis/distribution_function.py
@@ -130,7 +130,10 @@ def plot_all(dict_list, label = None):
 if __name__ == "__main__":
     import sys
 
-    if len(sys.argv) != 2: sys.exit("Required argument: directory")
+    if len(sys.argv) != 2:
+        sys.exit("Required argument: directory containing collection of "
+                 "shapefiles")
+        
     d = read(sys.argv[1])
     plot_all([d])
     plt.show()
diff --git a/Inst_eddies/config.f90 b/Inst_eddies/config.f90
index 7a2e63b3312fd1acecebee29145ac0c145106fe3..9cb8351bcb200a01d55f369942de18aed668f211 100644
--- a/Inst_eddies/config.f90
+++ b/Inst_eddies/config.f90
@@ -24,7 +24,7 @@ contains
     !----------------------------------------------------------------------
 
     write(unit = error_unit, nml = main_nml)
-    write(unit = error_unit, fmt = *) "Enter namelist main_nml."
+    write(unit = error_unit, fmt = *) "config: Enter namelist main_nml."
     read(unit = *, nml = main_nml)
     call write_nml(shp_tr_dir = "SHPC_cyclo")
     call write_nml(shp_tr_dir = "SHPC_anti")
@@ -54,9 +54,9 @@ contains
     ! (This also allows us to verify that the directory shp_tr_dir exists.)
 
     if (iostat /= 0) then
-       write(unit = error_unit, fmt = *) trim(iomsg)
-       write(unit = error_unit, fmt = *) 'Have you created the directory "', &
-            shp_tr_dir, '"?'
+       write(unit = error_unit, fmt = *) "write_nml: ", trim(iomsg)
+       write(unit = error_unit, fmt = *) 'write_nml: ', &
+            'Have you created the directory "', shp_tr_dir, '"?'
        stop 1
     end if
 
diff --git a/Inst_eddies/inst_eddies.f90 b/Inst_eddies/inst_eddies.f90
index c4416e49d2f27d0a9648c19230d2d825bf9682d4..3799a74b0651bdeb69774056710bb9acb838657c 100644
--- a/Inst_eddies/inst_eddies.f90
+++ b/Inst_eddies/inst_eddies.f90
@@ -104,7 +104,7 @@ program inst_eddies
   ! As we are requiring the grid spacing to be uniform, the value of
   ! "periodic" may be deduced from the values of step(1) and nlon:
   periodic = nint(twopi / step(1)) == nlon
-  print *, "periodic = ", periodic
+  print *, "inst_eddies: periodic = ", periodic
 
   call assert(2 * max_radius_deg(1) < 180., "inst_eddies max_radius_deg")
   ! (Let us require this even if not periodic. This is clearer.)
@@ -194,7 +194,8 @@ program inst_eddies
 
   CALL shp_tr_close(hshp_cyclo)
   CALL shp_tr_close(hshp_anti)
-  print *, 'Created shapefile collections in SHPC_cyclo and SHPC_anti.'
+  print *, 'inst_eddies: Created shapefile collections in SHPC_cyclo and ', &
+       'SHPC_anti.'
   call write_aux(corner_deg, step_deg, nlon, nlat, n_cyclo, &
        shp_tr_dir = "SHPC_cyclo")
   call write_aux(corner_deg, step_deg, nlon, nlat, n_anti, &
diff --git a/Inst_eddies/inst_eddies_in.py b/Inst_eddies/inst_eddies_in.py
index 262a256a3a9b00bcbcae6e57b9318d6bece2cdc9..217176ba14e65d01b6491d52f02a823613a1066e 100755
--- a/Inst_eddies/inst_eddies_in.py
+++ b/Inst_eddies/inst_eddies_in.py
@@ -45,7 +45,7 @@ else:
     last_date = my_date
 
 while True:
-    print("Date:", my_date)
+    print("inst_eddies.py: Date:", my_date)
     
     if os.access(nc_file, os.F_OK):
         if args.bbox:
@@ -69,7 +69,7 @@ while True:
         os.remove("h.nc")
         os.remove("uv.nc")
     else:
-        print("Missing file:", nc_file)
+        print("inst_eddies.py: Missing file:", nc_file)
 
     for orient in ["cyclo", "anti"]:
         if os.access(f"SHPC_{orient}_all_dates", os.F_OK):