The documentation says if you have all 'old' servers shut
down, and you use DBUnload to connect to an old database on
the same machine via Share Memory connection, DBUnload will
dump an older database. I've experimented with all sorts of
switches, but DBUnload fails to connect saying the database
was created with a different version of the software. I've
even tried to use Sybase Central with the same results.

I'm running from the command line with the following parms:
"C:\Program Files\SQL Anywhere 11\Bin32\dbunload.exe" -v -o
runlog.txt -c
"DBF=engine-old.db;uid=dba;pwd=sql;LOG=mylog.txt" \unload

Please see attached log file for specifics details. Any
idea why this is failing to connect?

Thu Mar 04 2010 10:24:42
10:24:42 Attempting to connect using:
UID=dba;PWD=********;DBF=engine-old.db;LOG=mylog.txt;APP='Unload Support Connection'
10:24:42 Attempting to connect to a running server...
10:24:42 Trying to start SharedMemory link ...
10:24:42 SharedMemory link started successfully
10:24:42 Attempting SharedMemory connection (no sasrv.ini cached address)
10:24:42 Failed to connect over SharedMemory
10:24:42 No server found, attempting to start a personal server...
10:24:43 Autostarted server, attempting to connect using:
UID=dba;PWD=********;DBF=engine-old.db;LOG=mylog.txt;APP='Unload Support Connection'
10:24:43 Attempting SharedMemory connection (no sasrv.ini cached address)
10:24:43 Connected to server over SharedMemory
10:24:43 Connected to SQL Anywhere Server version 11.0.1.2044
10:24:43 Application information:
10:24:43 IP=192.168.0.251;HOST=VOSTRO;OSUSER=Russ;OS='Windows XP Build 2600 Service Pack 3';EXE='C:\Program Files\SQL Anywhere 11\Bin32\dbunload.exe';PID=0xe9c;THREAD=0xab8;VERSION=11.0.1.2044;API=DBLIB;TIMEZONEADJUSTMENT=-300;APPINFO='Unload Support Connection'
10:24:43 Connected to the server, attempting to connect to a running database...
10:24:43 Database is running, but could not connect to it
10:24:43 Unable to start specified database: 'engine-old.db' was created by a different version of the software
10:24:43 Communication function i_cs_HandleSQLPresError code 5
10:24:43 Communication function StrmGetInd code 2

Thu Mar 04 2010 10:24:43
10:24:43 Attempting to connect using:
UID=dba;PWD=********;DBF=engine-old.db;ENG=dbunload_support_engine;START='C:\Program Files\SQL Anywhere 11\Bin32\dbunlspt.exe -qi -qs -hi -hV -ch 40p ';LOG=mylog.txt;APP='Unload Support Connection'
10:24:43 Attempting to connect to a running server...
10:24:43 Trying to start SharedMemory link ...
10:24:43 SharedMemory link started successfully
10:24:43 Attempting SharedMemory connection (no sasrv.ini cached address)
10:24:43 Failed to connect over SharedMemory
10:24:43 No server found, attempting to run START line...
10:24:43 Failed to autostart server
10:24:43 Attempting SharedMemory connection (no sasrv.ini cached address)
10:24:43 Failed to connect over SharedMemory
10:24:43 Cannot connect to server