frm#0 and frm#1 won't work, # based index as of now works only with the objects inside a window.

Let me try reproduce getobjectlist ('frm1')

Yes its a bug, will work on it.

I'm able to reproduce the bug with Hello World test case from here http://live.gnome.org/PyGTK

Reproducible with 2 instances of the above program

#!/usr/bin/env python
import pygtk
pygtk.require('2.0')
import gtk
# Create a new window
window = gtk.Window()

# Here we connect the "delete-event" event to a signal handler.
# This event occurs when we the user closes window,
# We connect it to gtk.main_quit, so it quits the main loop
# and the program terminates
window.connect("delete-event", gtk.main_quit)

# Sets the border width of the window.
window.set_border_width(10)

# Creates a new button with the label "Hello World".
button = gtk.Button("Hello World")

# This is a callback function, which we later will connect
# to the clicked signal of the button, which will be triggered
# when the user clicks the button with a mouse.
def on_button_clicked(button):
    print "Hello World"
# When the button receives the "clicked" signal, it will call the
# function hello() defined above.
button.connect("clicked", on_button_clicked)

# This packs the button into the window (which is a container).
window.add(button)

# Show the window and the button
window.show_all()
# Run the main loop, to process events such a key presses
# and mouse movements.
gtk.main()

The code you sent to is failed on operating the widget except getobjectlist.
I modified to find all frm or dlg and return it's table, but still failed on later.
 
----------------------
        // Get current window info from current hash table entry
        // Naming convention is little awkward !
        gchar *tmpfix = g_strdup (context);
        if (!g_strncasecmp(tmpfix, "frm", 3)) {
            g_free (tmpfix);
                        tmpfix = g_strdup ("frm*");
        } else if (!g_strncasecmp(context, "dlg", 3)) {
            g_free (tmpfix);
                        tmpfix = g_strdup ("dlg*");
        }
 
        cur_component = get_object_def (cur_window, tmpfix, NULL, cctxt->log_fp, TRUE);
        g_free (tmpfix);
-----------------------
The reason is if there are two windows that both donot have name, ldtp will name them as frm0, frm1. However, when try to find frm1 in both application, (yes, frm1 will be found), it will not find frm1 in 2rd application because the hashtable still contained frm0 for it.
 
From the log, I see ldtp will search application more then 3 time even successfully. I totally confused them :(

$ cat 2win.py
#!/usr/bin/env python

import pygtk
pygtk.require('2.0')
import gtk

# Create a new window
window = gtk.Window()

# Here we connect the "delete-event" event to a signal handler.
# This event occurs when we the user closes window,
# We connect it to gtk.main_quit, so it quits the main loop
# and the program terminates
window.connect("delete-event", gtk.main_quit)

# Sets the border width of the window.
window.set_border_width(100)
window.set_title('frmwindow1')

# Creates a new button with the label "Hello World".
button = gtk.Button("Hello World")

# This is a callback function, which we later will connect
# to the clicked signal of the button, which will be triggered
# when the user clicks the button with a mouse.
def on_button_clicked(button):
    print "Hello World"
    test()

# When the button receives the "clicked" signal, it will call the
# function hello() defined above.
button.connect("clicked", on_button_clicked)

# This packs the button into the window (which is a container).
window.add(button)
win1 = None

def cancel_button_clicked(button):
    global win1
    print "I'm being clicked"


def test():
    global win1, cancel_button

    win1 = gtk.Window()
    button1 = gtk.Button("touch me")
    button1.connect("clicked", cancel_button_clicked)
    win1.add(button1)
    win1.set_deletable (True)
    win1.show_all()
    gtk.main()

# Show the window and the button
window.show_all()
# Run the main loop, to process events such a key presses
# and mouse movements.
gtk.main()

Step to repro:
1. run first app by Nags, then run 2rd which wrote by me, click "Hello World" button on 2rd window, now you will see "touch me" button.
2. run ldtp &
3. try to run following command:
>>> from ldtp import * 
>>> getwindowlist()    
125 ()
[u'frmwindow1', u'frm0', u'frm1', ,,,]
>>> getobjectlist('frm1')
126 ('frm0')
[u'flr3', u'flr4', u'ukn0', u'ukn1', u'ukn2', u'flr0', u'frm0', u'flr1',
u'flr2']
>>> getobjectlist('frm1') 
getresponse: Window does not exist
Traceback (most recent call last):

+ Trace 208635

not exist'
>>> click('frm1', 'btntouchme')
getresponse: Window does not exist
Traceback (most recent call last):

+ Trace 208635

not exist'

Bug is here:
----------------------------------------------------------------------
			for (j = 0; ; j++) {
				gchar *tmp = g_strdup_printf ("%ld", j);
				g_print ("Window name NULL, %ld %d\n", j, __LINE__);
				if (tmp) {
					tmp_window_name = get_window_name_in_appmap_format (tmp, role);
					g_free (tmp);
					tmp = NULL;
				}
				if (tmp_window_name && \
				    g_hash_table_lookup_extended (tmpTable,
								  (gconstpointer)tmp_window_name,
								  NULL, NULL) == FALSE) {
					if (j > 1 && flag)
						*flag = TRUE;
					break;
				}
			}
----------------------------------------------------------------------
Actually, line should be this:
if (j > 0 && flag)

worked.

Fixed in my local copy as well. Thanks for identifying the issue :)