Common subdirectories: original_src/src/.deps and my_src/src/.deps
diff -u original_src/src/files.c my_src/src/files.c
--- original_src/src/files.c	2015-12-06 09:01:30.000000000 +0530
+++ my_src/src/files.c	2015-12-24 16:41:15.366328000 +0530
@@ -33,6 +33,31 @@
 #include <pwd.h>
 #include <libgen.h>
 
+/*0 implies valid address and filename, file doesn't exist at mentioned folder.
+-1 implies invalid address incorrect address. -2 implies invalid filename.*/
+ int determine(const char *a)
+{
+    int i, len = strlen(a);
+    char *x; 
+    struct stat buf2;
+  
+    mistakes = 0; 
+    x = charalloc(sizeof(a));
+
+    for (i = len; i >= 0; --i) {
+        if (a[i] == '/') {
+            x = realloc(x, i + 2);
+            strcpyfu(x, a, 0, i + 1);
+            x[i + 2] =  '\0';
+            if (stat(x, &buf2) == -1)
+                ++mistakes;
+        } 
+    }
+    free(x);
+    x = NULL;
+    return mistakes;
+}
+
 /* Add an entry to the openfile openfilestruct.  This should only be
  * called from open_buffer(). */
 void make_new_buffer(void)
@@ -923,6 +948,7 @@
  * with a 0 return value.  *f is set to the opened file. */
 int open_file(const char *filename, bool newfie, bool quiet, FILE **f)
 {
+    int m;
     struct stat fileinfo, fileinfo2;
     int fd;
     char *full_filename;
@@ -949,9 +975,15 @@
 	}
 
 	if (newfie) {
-	    if (!quiet)
-		statusbar(_("New File"));
-	    return -2;
+	    if (!quiet) {
+            m = determine(filename);
+            if (m == 0)
+                statusbar(_("New File"));
+            else if (m > 0)
+                statusbar(_("Invalid path"));
+            else
+                statusbar(_("Unexpected Error"));
+        } return -2;
 	}
 	statusbar(_("\"%s\" not found"), filename);
 	beep();
@@ -2247,7 +2279,7 @@
 
     ans = mallocstrcpy(NULL,
 #ifndef NANO_TINY
-	(!exiting && openfile->mark_set) ? "" :
+	((!exiting && openfile->mark_set) || mistakes > 0) ? "" :
 #endif
 	openfile->filename);
 
diff -u original_src/src/global.c my_src/src/global.c
--- original_src/src/global.c	2015-12-05 10:36:09.000000000 +0530
+++ my_src/src/global.c	2015-12-23 17:04:56.360383000 +0530
@@ -40,6 +40,8 @@
 	/* Whether the current keystroke is an extended keypad value. */
 bool focusing = FALSE;
 	/* Whether an update of the edit window should center the cursor. */
+int mistakes;
+    /*Mistakes in the path of the file mentioned.*/
 
 #ifndef NANO_TINY
 int controlleft = CONTROL_LEFT;
Binary files original_src/src/nano and my_src/src/nano differ
diff -u original_src/src/proto.h my_src/src/proto.h
--- original_src/src/proto.h	2015-12-05 10:36:09.000000000 +0530
+++ my_src/src/proto.h	2015-12-23 16:53:32.932380000 +0530
@@ -34,6 +34,7 @@
 extern bool meta_key;
 extern bool func_key;
 extern bool focusing;
+extern int mistakes;
 
 #ifndef NANO_TINY
 extern int controlleft;
@@ -278,6 +279,7 @@
 void do_uncut_text(void);
 
 /* All functions in files.c. */
+int determine(const char *a);
 void make_new_buffer(void);
 void initialize_buffer_text(void);
 void open_buffer(const char *filename, bool undoable);
@@ -712,6 +714,7 @@
 void do_verbatim_input(void);
 
 /* All functions in utils.c. */
+char *strcpyfu(char *dest, const char *src, int from, int upto);
 void get_homedir(void);
 bool parse_num(const char *str, ssize_t *val);
 bool parse_line_column(const char *str, ssize_t *line, ssize_t *column);
diff -u original_src/src/utils.c my_src/src/utils.c
--- original_src/src/utils.c	2015-12-05 10:36:09.000000000 +0530
+++ my_src/src/utils.c	2015-12-21 18:44:56.048403000 +0530
@@ -30,6 +30,24 @@
 #include <ctype.h>
 #include <errno.h>
 
+ char *strcpyfu(char *dest, const char *src, int from, int upto)
+{
+    int i = from;
+    while (i > 0) {
+                ++src;
+                --i;
+    }
+        i = from;
+    while ( i < upto && *src != '\0') {
+                *dest = *src;
+                ++dest;
+                ++src;
+                ++i;
+    }
+        *dest = '\0';
+        return dest;
+}
+
 /* Return the user's home directory.  We use $HOME, and if that fails,
  * we fall back on the home directory of the effective user ID. */
 void get_homedir(void)