Product: Microsoft SQL Server Native Client -- Error 1706. An installation package for the product Microsoft SQL Server Native Client cannot be found. Try the installation again using a valid copy of the installation package 'sqlncli.msi'.
Logged as MsiInstaller in App Log.
The install fails with this and two other items in the bos that shows successful install items
SQL Server Database Services
Workstation Components, Books Online, Development Tools
Installed 2 necessary programs;
Windows Installer 3.1 and .NET framework 2.0 redistr.
Any Ideas 
Cannot complete Install of Express
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Cannot complete Install of Express
rkimble
Me Too!
It would be perfect if microsoft can has a small tools to remove all history of SQL server installation (no matter beta or not)
Jitendra.net
Existing SQL Native Client Installation May Cause Setup to Fail
dinh xuan dung
From another post in the forum (by Otto Fischer), see if this helps:
First I extracted the files in a separate directory:< xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
SQLEXPR.EXE" /x:c:\sqlexprtmp
Then I searched and executed “sqlncli.msi”
I clicked on “uninstall”.
After this I rebooted the computer (in German: “reboot tut gut”) and installed (this time successful) sql-express.
Jarda Kroupa
OrlanduMike
>This fixed the problem for me as well. I can tell you what causes the problem (or at least how to reproduce it)
>Setup a WindowsXP machine with NO Service Packs.
> Try to install SQLEXPR.EXE
>It will fail because SP 2 is not insalled.
>Install SP2
>Try to reinstall SQLEXPR.EXE
>It will fail of the SQL Native Client.
That is exactly the problem. With luck Miscrosoft will now fix it, because it really puzzled me until I read this thread.
Gustavo Echeverry
Mariano_60
Weston Hutchins - MSFT
Excellent. I had the same problem - caused by trying to install it on a machine which didn't originally have a valid SP2 update - and your solution solved the problem.
def0
The advice given above worked great for me. I tried to install SQL server 2005 express but during the installation I got the message that SP2 was a requirement.
After I did the SP2 update and tried to continue with the install I got the error. I did go to add/remove programs and removed the "Native Client" and then the installation worked with no errors.
Thanks
MBann
MSI (c) (B8:34) [19:05:44:703]: Resetting cached policy values
MSI (c) (B8:34) [19:05:44:703]: Machine policy value 'Debug' is 0
MSI (c) (B8:34) [19:05:44:703]: ******* RunEngine:
******* Product: {BF251EAF-8697-4E89-BF09-C998F97BBC40}
******* Action:
******* CommandLine: **********
MSI (c) (B8:34) [19:05:44:703]: Client-side and UI is none or basic: Running entire install on the server.
MSI (c) (B8:34) [19:05:44:703]: Grabbed execution mutex.
MSI (c) (B8:34) [19:05:44:703]: Cloaking enabled.
MSI (c) (B8:34) [19:05:44:703]: Attempting to enable all disabled priveleges before calling Install on Server
MSI (c) (B8:34) [19:05:44:703]: Incrementing counter to disable shutdown. Counter after increment: 0
MSI (s) (E8:30) [19:05:44:703]: Grabbed execution mutex.
MSI (s) (E8:9C) [19:05:44:703]: Resetting cached policy values
MSI (s) (E8:9C) [19:05:44:703]: Machine policy value 'Debug' is 0
MSI (s) (E8:9C) [19:05:44:703]: ******* RunEngine:
******* Product: {BF251EAF-8697-4E89-BF09-C998F97BBC40}
******* Action:
******* CommandLine: **********
MSI (s) (E8:9C) [19:05:44:703]: Machine policy value 'DisableUserInstalls' is 0
MSI (s) (E8:9C) [19:05:44:703]: Warning: Local cached package 'c:\WINDOWS\Installer\12e22e.msi' is missing.
MSI (s) (E8:9C) [19:05:44:703]: User policy value 'SearchOrder' is 'nmu'
MSI (s) (E8:9C) [19:05:44:703]: User policy value 'DisableMedia' is 0
MSI (s) (E8:9C) [19:05:44:703]: Machine policy value 'AllowLockdownMedia' is 0
MSI (s) (E8:9C) [19:05:44:703]: SOURCEMGMT: Media enabled only if package is safe.
MSI (s) (E8:9C) [19:05:44:703]: SOURCEMGMT: Looking for sourcelist for product {BF251EAF-8697-4E89-BF09-C998F97BBC40}
MSI (s) (E8:9C) [19:05:44:703]: SOURCEMGMT: Adding {BF251EAF-8697-4E89-BF09-C998F97BBC40}; to potential sourcelist list (pcode;disk;relpath).
MSI (s) (E8:9C) [19:05:44:703]: SOURCEMGMT: Now checking product {BF251EAF-8697-4E89-BF09-C998F97BBC40}
MSI (s) (E8:9C) [19:05:44:703]: SOURCEMGMT: Media is enabled for product.
MSI (s) (E8:9C) [19:05:44:703]: SOURCEMGMT: Attempting to use LastUsedSource from source list.
MSI (s) (E8:9C) [19:05:44:703]: SOURCEMGMT: Trying source c:\58ccfb60ac52bec0f1\setup\.
MSI (s) (E8:9C) [19:05:44:703]: Note: 1: 2203 2: c:\58ccfb60ac52bec0f1\setup\sqlncli.msi 3: -2147287037
MSI (s) (E8:9C) [19:05:44:703]: SOURCEMGMT: Source is invalid due to missing/inaccessible package.
MSI (s) (E8:9C) [19:05:44:703]: Note: 1: 1706 2: -2147483647 3: sqlncli.msi
MSI (s) (E8:9C) [19:05:44:703]: SOURCEMGMT: Processing net source list.
MSI (s) (E8:9C) [19:05:44:703]: Note: 1: 1706 2: -2147483647 3: sqlncli.msi
MSI (s) (E8:9C) [19:05:44:703]: SOURCEMGMT: Processing media source list.
MSI (s) (E8:9C) [19:05:44:718]: SOURCEMGMT: Trying media source D:\.
MSI (s) (E8:9C) [19:05:44:718]: Note: 1: 2203 2: D:\sqlncli.msi 3: -2147287038
MSI (s) (E8:9C) [19:05:44:718]: SOURCEMGMT: Source is invalid due to missing/inaccessible package.
MSI (s) (E8:9C) [19:05:44:718]: Note: 1: 1706 2: -2147483647 3: sqlncli.msi
MSI (s) (E8:9C) [19:05:44:718]: SOURCEMGMT: Processing URL source list.
MSI (s) (E8:9C) [19:05:44:718]: Note: 1: 1402 2: UNKNOWN\URL 3: 2
MSI (s) (E8:9C) [19:05:44:718]: Note: 1: 1706 2: -2147483647 3: sqlncli.msi
MSI (s) (E8:9C) [19:05:44:718]: Note: 1: 1706 2: 3: sqlncli.msi
MSI (s) (E8:9C) [19:05:44:718]: SOURCEMGMT: Failed to resolve source
MSI (s) (E8:9C) [19:05:44:718]: MainEngineThread is returning 1612
MSI (c) (B8:34) [19:05:44:718]: Decrementing counter to disable shutdown. If counter >= 0, shutdown will be denied. Counter after decrement: -1
MSI (c) (B8:34) [19:05:44:718]: MainEngineThread is returning 1612
=== Verbose logging stopped: 11/30/2005 19:05:44 ===
RB123
This fixed the problem for me as well. I can tell you what causes the problem (or at least how to reproduce it)
Setup a WindowsXP machine with NO Service Packs.
Try to install SQLEXPR.EXE
It will fail because SP 2 is not insalled.
Install SP2
Try to reinstall SQLEXPR.EXE
It will fail of the SQL Native Client.
Following the workaround in this post and uninstall SQL Native Client
Reboot
Reinstall SQLEXPR.EXE and it works fine.
Miguel de Melo
Jake Montgomery
Worked like a charm! Thanks much!