apsfilter V5.4.2 -- HP 4050 (PS) doesn't print the last page

[Alexey Koptsevich <kopts@xxxxxxxxxxxxxxxxxxx>]

Hello,

I have a problem with HP 4050 duplex printing. I have created 2 printers
in /etc/printcap, one with 
HARDWARE_DUPLEX=""
DUPLEX=""
and another with
HARDWARE_DUPLEX=set
DUPLEX=set
If I switch on/off the printer and then first use it in simplex mode
everything is going fine. But once I use it in dupolex mode it stucks in
it for all further printing tasks. Moreover, it prints only even number of
pages in duplex mode, and if I send odd number it does not print the last
page but waits for another one page.

As I understand, the problem is in passing escape characters. How can I do
it properly?

Thanks,
Alex



P.S. Answers to your questionnaire:

1.      Operating System  : FreeBSD 4.2-RELEASE
        apsfilter Rel.    : apsfilter-7.0 developement SNAPSHOT
        Patch applied ?   : 
        ghostscript Rel.  : transparent to gs
        Printer           : HP 4050
        serial/parallel   : parallel printer
        Mono/Color        : b/w
        Postscript-Printer: yes
        Print Resolution  : 1200
        Your Full Name    : Alexey Koptsevich
        Your e-mail addr  : kopts@astro.ioffe.rssi.ru

2. transparent

3. no OS errors

5. I do not see anything suspicious in debug output either.

6. No error messages.

7. I tried to modify apsfilterrc in order to include
double/one-sided printing ESC sequences before and eject page after -- no
effect.

8. No private configs.

9. I print postscript files.

10. No error output

11. I use lpd

Thanks,
Alex