--- a/drivers/xtk/tkpgplot.c	2000-12-13 03:16:28.000000000 +0100
+++ b/drivers/xtk/tkpgplot.c	2013-01-15 11:02:27.221231471 +0100
@@ -417,7 +417,7 @@
 /*
  * If Tk_Init() hasn't been called, then there won't be a main window
  * yet. In such cases, Tk_MainWindow() places a suitable error message
- * in interp->result.
+ * in Tcl_GetStringResult(interp).
  */
   if(!main_w)
     return TCL_ERROR;
@@ -2136,7 +2136,7 @@
     tkpg->border = bd;
     tkpg_draw_3d_border(tkpg);
   } else {
-    fprintf(stderr, "Tk_Get3DBorder failed: %s\n", tkpg->interp->result);
+    fprintf(stderr, "Tk_Get3DBorder failed: %s\n", Tcl_GetStringResult(tkpg->interp));
   };
 }
 
@@ -2261,7 +2261,7 @@
  *  argv            char ** The array of 'argc' configuration arguments.
  * Output:
  *  return           int    TCL_ERROR and the context of the error
- *                          is recorded in interp->result.
+ *                          is recorded in Tcl_GetStringResult(result).
  */
 static int tkpg_scrollbar_error(TkPgplot *tkpg, Tcl_Interp *interp, 
 			       char *widget, char *view, int argc,
@@ -2586,7 +2586,7 @@
  * Output:
  *  return   Tk_Window    The top-level window of the path, or NULL if
  *                        it doesn't exist. In the latter case an error
- *                        message will have been appended to interp->result.
+ *                        message will have been appended to Tcl_GetStringResult(interp).
  */
 static Tk_Window tkpg_toplevel_of_path(Tcl_Interp *interp, Tk_Window main_w,
 				       char *path)
@@ -2630,7 +2630,7 @@
   free(first);
 /*
  * If the window doesn't exist, Tk_NameToWindow() is documented to place
- * an error message in interp->result, so just return the error condition.
+ * an error message in Tcl_GetStringResult(interp), so just return the error condition.
  */
   if(!w)
     return NULL;