diff -Naur gdb-6.3/gdb/gdbtk/generic/gdbtk-cmds.c gdb-6.3-modified/gdb/gdbtk/generic/gdbtk-cmds.c
--- gdb-6.3/gdb/gdbtk/generic/gdbtk-cmds.c	2005-05-15 21:49:09.000000000 -1100
+++ gdb-6.3-modified/gdb/gdbtk/generic/gdbtk-cmds.c	2005-05-16 23:20:03.338797451 -1100
@@ -2114,6 +2114,15 @@
 
   if (objc == 1)
     {
+      /* This function can be called, before the target is properly
+         set-up, the following prevents an error, by trying to
+	 read_pc when there is no pc to read. */
+      if (!target_has_registers)
+        {
+	  gdbtk_set_result (interp, "Target has no PC", -1);
+	  return TCL_ERROR;
+	}  
+    
       if (deprecated_selected_frame
 	  && (get_frame_pc (deprecated_selected_frame) != read_pc ()))
         {