crashing vnc server (copyPlane)

[Felix Steffenhagen]

Hello,

I have a crashing VNC Server (RealVNC Enterprise Server 4.1.8) on a Solaris
machine. The Server (we have a lot of them running on several machines) all
work fine.  But now a user has a problem with when he starts
a fpga-editor (for chip development). The VNC server crashes after starting
this program. With the old version ( 3.3.x ) there's no problem.

Here is an abstract of the Server's log file:
...
Fri Dec  9 11:53:07 2005
 Connections: closed: 172.17.218.174::1157 (Disconnection by client)
 SMsgWriter:  framebuffer updates 949
 SMsgWriter:    copyRect rects 214, bytes 3424
 SMsgWriter:    hextile rects 5396, bytes 4352580
 SMsgWriter:    ZRLE rects 2, bytes 72288
 SMsgWriter:    raw bytes equivalent 54631226, compression ratio 12.35

Fatal server error:
No copyPlane proc registered for depth 16

X connection to hatysa:8.0 broken (explicit kill or server shutdown).^M
xterm:  fatal IO error 32 (Broken pipe) or KillClient on X server "hatysa:
8.0"^M
xterm:  fatal IO error 32 (Broken pipe) or KillClient on X server "hatysa:
8.0"^M
xterm:  fatal IO error 32 (Broken pipe) or KillClient on X server "hatysa:
8.0"^M
xterm:  fatal IO error 32 (Broken pipe) or KillClient on X server "hatysa:
8.0"^M
xterm:  fatal IO error 32 (Broken pipe) or KillClient on X server "hatysa:
8.0"^M
xterm:  fatal IO error 32 (Broken pipe) or KillClient on X server "hatysa:
8.0"^M
xterm:  fatal IO error 32 (Broken pipe) or KillClient on X server "hatysa:
8.0"^M
xterm:  fatal IO error 32 (Broken pipe) or KillClient on X server "hatysa:
8.0"^M
xterm:  fatal IO error 131 (Connection reset by peer) or KillClient on X
server "hatysa:8.0"^M

Any ideas what's happening there?

best regards,
Felix Steffenhagen