diff --git a/src/geo_load.hpp b/src/geo_load.hpp
index 3adba32..9e34aaa 100644
--- a/src/geo_load.hpp
+++ b/src/geo_load.hpp
@@ -1132,7 +1132,14 @@
                 return _errv ;
             }
         }
+        else
+        {
+            _jlog.  push (
+    "**input error: couldn't determine format of GEOM.\n") ;
 
+            return __invalid_argument ;
+        }
+    
         return (  _errv ) ;
     }
 
diff --git a/src/hfn_load.hpp b/src/hfn_load.hpp
index 78c543f..1c66f33 100644
--- a/src/hfn_load.hpp
+++ b/src/hfn_load.hpp
@@ -1931,6 +1931,13 @@
                 _errv = __invalid_argument ;
             }
         }
+        else
+        {
+            _jlog.  push (
+    "**input error: couldn't determine format of HFUN.\n") ;
+
+            return __invalid_argument ;
+        }
 
         return (  _errv ) ;
     }
diff --git a/src/ini_load.hpp b/src/ini_load.hpp
index 0cb3f2b..f6a107a 100644
--- a/src/ini_load.hpp
+++ b/src/ini_load.hpp
@@ -1158,6 +1158,13 @@
                 _errv = __invalid_indexing ;
             }
         }
+        else
+        {
+            _jlog.  push (
+    "**input error: couldn't determine format of INIT.\n") ;
+
+            return __invalid_argument ;
+        }
 
         return (  _errv ) ;
     }
diff --git a/src/jigsaw.hpp b/src/jigsaw.hpp
index ec541e5..57a4435 100644
--- a/src/jigsaw.hpp
+++ b/src/jigsaw.hpp
@@ -1629,7 +1629,7 @@
                 _retv = -2 ;
 
                 std::cout <<
-                "run jigsaw jigname.jig";
+                "Usage: jigsaw user-opts.jig" ;
                 std::cout <<  std::endl ;
 
                 break ;
@@ -1665,6 +1665,11 @@
                 break ;
             }
         }
+        if (_retv == -1)
+        {
+            std::cout << 
+        "**parse error: *.jig file not found!" << std::endl;
+        }
         if (_retv != +0) return ( _retv ) ;
 
     /*--------------------------------- setup *.JLOG file */
diff --git a/src/marche.hpp b/src/marche.hpp
index 9110168..fb5c048 100644
--- a/src/marche.hpp
+++ b/src/marche.hpp
@@ -326,7 +326,7 @@
                 _retv = -2 ;
 
                 std::cout <<
-                "run marche jigname.jig";
+                "Usage: marche user-opts.jig" ;
                 std::cout <<  std::endl ;
 
                 break ;
@@ -362,6 +362,11 @@
                 break ;
             }
         }
+        if (_retv == -1)
+        {
+            std::cout << 
+        "**parse error: *.jig file not found!" << std::endl;
+        }
         if (_retv != +0) return ( _retv ) ;
 
     /*--------------------------------- setup *.JLOG file */
diff --git a/src/tripod.hpp b/src/tripod.hpp
index 608bc9a..63faed2 100644
--- a/src/tripod.hpp
+++ b/src/tripod.hpp
@@ -619,7 +619,7 @@
                 _retv = -2 ;
 
                 std::cout <<
-                "run tripod jigname.jig";
+                "Usage: tripod user-opts.jig" ;
                 std::cout <<  std::endl ;
 
                 break ;
@@ -655,6 +655,11 @@
                 break ;
             }
         }
+        if (_retv == -1)
+        {
+            std::cout << 
+        "**parse error: *.jig file not found!" << std::endl;
+        }
         if (_retv != +0) return ( _retv ) ;
 
     /*--------------------------------- setup *.JLOG file */