diff --git a/doc/index.html b/doc/index.html
index 11c24b35..a84ae802 100644
--- a/doc/index.html
+++ b/doc/index.html
@@ -137,6 +137,7 @@
             <td>3.1.0 release, ability to display simulation graphs and embeded images/logos<br>
             </td>
           </tr>
+
           <tr>
             <td>20230521<br>
             </td>
@@ -147,6 +148,15 @@
             </td>
           </tr>
 
+          <tr>
+            <td>20241113<br>
+            </td>
+            <td>3.4.6<br>
+            </td>
+            <td>3.4.6 release.
+            </td>
+          </tr>
+
 
           <tr>
             <td><br>
diff --git a/src/hilight.c b/src/hilight.c
index b4a84303..1035cab8 100644
--- a/src/hilight.c
+++ b/src/hilight.c
@@ -2254,13 +2254,13 @@ void print_hilight_net(int show)
 
  prepare_netlist_structs(1); /* use full prepare_netlist_structs(1)  to recognize pin direction */
                              /* when creating pins from hilight nets 20171221 */
- if(!(fd = open_tmpfile("hilight2_", &filename_ptr)) ) {
+ if(!(fd = open_tmpfile("hilight2_", "", &filename_ptr)) ) {
    fprintf(errfp, "print_hilight_net(): can not create tmpfile %s\n", filename_ptr);
    return;
  }
  my_strdup(_ALLOC_ID_, &filetmp2, filename_ptr);
  fclose(fd);
- if(!(fd = open_tmpfile("hilight1_", &filename_ptr))) {
+ if(!(fd = open_tmpfile("hilight1_", "", &filename_ptr))) {
    fprintf(errfp, "print_hilight_net(): can not create tmpfile %s\n", filename_ptr);
    my_free(_ALLOC_ID_, &filetmp2);
    return;
diff --git a/src/psprint.c b/src/psprint.c
index 8d8581be..00393055 100644
--- a/src/psprint.c
+++ b/src/psprint.c
@@ -1093,7 +1093,7 @@ void create_ps(char **psfile, int what, int fullzoom, int eps)
   }
   if(what & 1) { /* prolog */
     numpages = 0;
-    if(!(fd = open_tmpfile("psplot_", psfile)) ) {
+    if(!(fd = open_tmpfile("psplot_", ".ps", psfile)) ) {
       fprintf(errfp, "ps_draw(): can not create tmpfile %s\n", *psfile);
       return;
     }
diff --git a/src/save.c b/src/save.c
index a5a3517e..d69b2bee 100644
--- a/src/save.c
+++ b/src/save.c
@@ -943,7 +943,7 @@ int raw_read_from_attr(Raw **rawptr, const char *type, double sweep1, double swe
     size_t length;
     if(i->prop_ptr && (b64_spice_data = get_tok_value(i->prop_ptr, "spice_data", 0))[0]) {
       length = strlen(b64_spice_data);
-      if( (fd = open_tmpfile("embedded_rawfile_", &tmp_filename)) ) {
+      if( (fd = open_tmpfile("embedded_rawfile_", ".raw", &tmp_filename)) ) {
         s = base64_decode(b64_spice_data, length, &decoded_length);
         fwrite(s, decoded_length, 1, fd);
         fclose(fd);
@@ -2301,14 +2301,14 @@ const char *create_tmpdir(char *prefix)
 /* after 5 unsuccessfull attemps give up */
 /* and return NULL */
 /* */
-FILE *open_tmpfile(char *prefix, char **filename)
+FILE *open_tmpfile(char *prefix, char *suffix, char **filename)
 {
   static char str[PATH_MAX]; /* safe even with multiple schematics, if immediately copied */
   int i;
   FILE *fd;
   struct stat buf;
   for(i=0; i<5; ++i) {
-    my_snprintf(str, S(str), "%s%s", tclgetvar("XSCHEM_TMP_DIR"), random_string(prefix));
+    my_snprintf(str, S(str), "%s%s%s", tclgetvar("XSCHEM_TMP_DIR"), random_string(prefix), suffix);
     *filename = str;
     if(stat(str, &buf) && (fd = fopen(str, "w")) ) { /* file must not exist */
       dbg(1, "open_tmpfile(): created file: %s\n", str);
diff --git a/src/xschem.h b/src/xschem.h
index 86bb2de3..3bd47b21 100644
--- a/src/xschem.h
+++ b/src/xschem.h
@@ -1741,7 +1741,7 @@ extern int pending_events(void);
 #endif
 extern void get_square(double x, double y, int *xx, int *yy);
 extern const char *create_tmpdir(char *prefix);
-extern FILE *open_tmpfile(char *prefix, char **filename);
+extern FILE *open_tmpfile(char *prefix, char *suffix, char **filename);
 extern void create_ps(char** psfile, int what, int fullzoom, int eps);
 extern void MyXCopyArea(Display* display, Drawable src, Drawable dest, GC gc, int src_x, int src_y, unsigned int width, unsigned int height, int dest_x, int dest_y);
 #endif /*CADGLOBALS */