Buffer pool fails during Natural installation

[Ralph_Zbrog]

I upgraded recently from ADA 61402 (x86) to ADA 61404 (x86-64) under SLES 10. Now I’m trying to upgrade from NAT633 (x86) to NAT635 (x86-64). (I select NDV, WebIO, and Remote Debugger installation options.)

The Natural installation fails when it attempts to invoke the Buffer Pool.

NATBPMON STATUS command could not
verify that the buffer pool is activ, although no
problem has been detected after starting the
buffer pool service NATBPSRV. Try to solve
the problem by restarting the buffer pool
(execute natbpsrv).
Message returned:
{Bufferpool version 6.3(635) of 11/12/2008}
{Buffer pool error: Unexpected system call
error occurred (20)}{Global shared memory
could not be attached.: shmkey = 63501111
}{Operating System Eror 2 - No such file or
directory}{}

When I try to invoke the BP manually via natbpsrv, I get

NATURAL/C Buffer Pool 6.3(635) of 11/12/2008 started.
The server process was aborted.

I’ve tried the manual Natural uninstall procedure, so SAGRM responds with

The automatic deinstallation of this product is not possible.

Any suggestions on how to complete the installation?