Ic habe versucht auf einem AMD A4 Notebook, CPU > 1 GHz und 8 GB RAM OC 3.2.0 zu installieren.
Die SQL Datenbank wurde auch nach installiert.
Beim Starten erscheint, nach einigem Warten, diese Fehler Meldung:

Value cannot be be null
Parameter name: path

See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
System.ArgumentNullException: Value cannot be null.
Parameter name: path
at System.IO.Directory.CreateDirectory(String path)
at QC3x.Start.Start_Load(Object sender, EventArgs e)
at System.EventHandler.Invoke(Object sender, EventArgs e)
at System.Windows.Forms.Form.OnLoad(EventArgs e)
at DevExpress.XtraEditors.XtraForm.OnLoad(EventArgs e)
at System.Windows.Forms.Form.OnCreateControl()
at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
at System.Windows.Forms.Control.CreateControl()
at System.Windows.Forms.Control.WmShowWindow(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.Form.WmShowWindow(Message& m)
at DevExpress.XtraEditors.DForm.WndProc(Message& m)
at DevExpress.XtraEditors.XtraForm.WndProc(Message& msg)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

************** Loaded Assemblies **************
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----------------------------------------
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----------------------------------------
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----------------------------------------
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----------------------------------------
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UIAutomationClient
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UIAutomationTypes
Assembly Version: 4.0.0.0
Win32 Version: 4.8.4515.0 built by: NET48REL1LAST_C
CodeBase: //CWINDOWS/Microsoft.Net/assembly/GAC_MSIL/UIAutomationTypes/v4.0_4.0.0.0__31bf3856ad364e35/UIAutomationTypes.dll" rel="nofollow">file//CWINDOWS/Microsoft.Net/assembly/GAC_MSIL/UIAutomationTypes/v4.0_4.0.0.0__31bf3856ad364e35/UIAutomationTypes.dll
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System.Data.Linq
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Win32 Version: 4.8.4084.0
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************** JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this
application or computer (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.

For example:

<configuration>
<system.windows.forms jitDebugging="true" />
</configuration>

When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the computer
rather than be handled by this dialog box.

Noch hab ich keine Idee dazu.
Gibt es im Datenordner (C:\Users\[anmeldename]\AppData\Local\) die Datei QC.log?
Dort könnten genauere Fehlerinfos drin sein.

zerus

Hier hab ich zwei Log Files

Nach einem risen Log File (~ 9MB)
Das teht oben im Header:

SQL-Instances: MSSQLLocalDB;v11.0;
02.07.2022 12:22:31 - LOG - QC3x 3.1.2.0, AMD A4-6210 APU with AMD Radeon R3 Graphics, 1800, 7128, 1920x1080, MS Win 10 Home (64-bit)
02.07.2022 12:22:32 - LOG - Getting File_Path
02.07.2022 12:23:32 - LOG - SQL Server : 14.0.1000.169, RTM, Express Edition (64-bit)
02.07.2022 12:23:32 - LOG - MS SQL Server 2017 Express
02.07.2022 12:23:32 - LOG - Instance: (LocalDB)\MSSQLLocalDB
02.07.2022 12:23:32 - LOG - Clearing SQL Pools ...
02.07.2022 12:23:37 - LOG - DB check done...
Dann wird wohl versucht Files auf die DB zu migrieren. Was aber nicht klappt, weil die Datenbank nicht vorhanden ist, obwohl Sie durch die Setup installiert wurde.
Steht an dessen Ende das her:

7/2/2022 12:40:19 PM - EXC - Cannot attach the file 'C:\Users\egonk\AppData\Local\QC.mdf' as database 'QC'. : at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData, DbConnectionPool pool, String accessToken, Boolean applyTransientFaultHandling, SqlAuthenticationProviderManager sqlAuthProviderManager)
at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)
at System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions)
at System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
at System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection)
at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)
at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
at System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry)
at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)
at System.Data.SqlClient.SqlConnection.Open()
at QC3x.Subs.ALTERDB()
7/2/2022 12:40:31 PM - LOG - End

Die 9 MB Textfiles kann ich hier nicht anhängen.

Die Datenbanksoftware wurde installiert, nicht aber die Datenbank.
Bei der ersten Installation gibt es einen Fehler, der dann zur Erzeugung der Datenbank führt.

Der Teil, wo das Log hier aufhört: 02.07.2022 12:23:37 - LOG - DB check done...
Kannst du die Zeilen darunter nochmal posten. Genau darunter läuft was schief.

Ansonsten probier mal in einem cmd-Fenster folgende Kommados aus (QC muss dabei geschlossen sein):
Daher kannst Du mal versuchen, folgende Kommandos nacheinander auszuführen:
sqllocaldb stop MSSQLLocalDB
sqllocaldb delete MSSQLLocalDB
sqllocaldb create MSSQLLocalDB
sqllocaldb start MSSQLLocalDB

Läuft das fehlerfrei durch? Eventuell klappt es danach mit QC.

zerus

Übers cmd promt:
Kriege ich folgende Meldung:

C:\Users\egonk>SqlLocalDB create MSSQLLocalDB
Fehler bei der Erstellung der LocalDB-Instanz 'MSSQLLocalDB' mit Version 11.0. Fehler:
The parameter for the LocalDB Instance API method is incorrect. Consult the API documentation.

02.07.2022 12:23:37 - LOG - v11.0 Instance found. Trying migration to MSSQLLocalDB...
02.07.2022 12:24:19 - ERR - Database file does Not exist. Resetting...
02.07.2022 12:24:19 - LOG - v11.0 Instance found. Trying migration to MSSQLLocalDB...
02.07.2022 12:24:19 - ERR - Database file does Not exist. Resetting...
02.07.2022 12:24:19 - LOG - v11.0 Instance found. Trying migration to MSSQLLocalDB...
02.07.2022 12:24:19 - ERR - Database file does Not exist. Resetting...
02.07.2022 12:24:19 - LOG - v11.0 Instance found. Trying migration to MSSQLLocalDB...
02.07.2022 12:24:19 - ERR - Database file does Not exist. Resetting...
02.07.2022 12:24:19 - LOG - v11.0 Instance found. Trying migration to MSSQLLocalDB...

Dasteht im Logfike. Das ist dann wohl eine Endlosschleife, die dann abbricht.

wir nähern uns dem Problem.

was zeigt sqllocaldb i

Sollte die SQL-Instanzen auflisten.
Korrekt für QC wäre MSSQLLocalDB

MSSQLLocalDB v11.0
Die Anwendung ist auch da er bekommt nur keine Datenbank auf oder angelegt.

Habe auch schon einen Bugfix für MSSQL installier ( KB5010786) keine Änderung

da sind 2 instanzen bei dir.

Wenn du die v11.0 nicht brauchst:
versuch mal ein
sqllocaldb stop v11.0
sqllocaldb delete v11.0

bei mir ist nur die eine MSSQLLocalDB.