Multi-images problem with im module

Hi!

I tried to make a mpeg2 video from a list of images. There are 14617 png 
files.
I use the following command :

transcode -V rgb24 -i La_Femme-squelette/femme_squelette-0* -g 1920x1080 --
import_asr 3 --multi_input -x im -f 24,2  --export_fps 25,3 -J modfps -c 
1440-14617 -Z 720x576 --export_asr 3 --export_prof dvd-pal -y ffmpeg -o 
La_Femme-squelette_pal

In itself, the transcoding works well and yields a proper PAL mpeg2 file with 
a 25fps.
The only problem is that while I request the frames from 1440 to 14617 (to 
skip one minute of black screen), it only encodes precisely 1212 frames and 
then stop.
Before transcode actually starts, it yields thousands of messages like this :

[transcode] warning: argc[14624]=La_Femme-squelette/femme_squelette-014595.png 
(unused)

So I guess it just overlooks files above "La_Femme-
squelette/femme_squelette-001212.png"

I have this with 1.1.1 and 1.1.2.
Is there any way to go around that?

Best regards,

	Richard Van Den Boom