¶ LEMR installation failure - .Net Framework version 4.8 required from LEMR version 2022.8.10.923 onwards
Symptom: LEMRSetup.exe fails to run, immediately exiting with errors in the Event Viewer as follows:
Log Name: ApplicationSource: .NET RuntimeDate: [date and time here]Event ID: 1026Task Category: NoneLevel: ErrorKeywords: ClassicUser: N/AComputer: [Computer name here]Description:Application: LEMRSetup.exeFramework Version: v4.0.30319Description: The process was terminated due to an unhandled exception.Exception Info: System.IO.FileNotFoundException at LEMR.Shared..cctor()Exception Info: System.TypeInitializationException at LEMR.Shared.LoggingNote(Byte, System.String, System.Object[]) at LEMR.Setup.Program.Main(System.String[])
And this error after that:
Log Name: ApplicationSource: Application ErrorDate: [date and time here]Event ID: 1000Task Category: (100)Level: ErrorKeywords: ClassicUser: N/AComputer: [Computer name here]Description:Faulting application name: LEMRSetup.exe, version: 2022.8.10.923, time stamp: 0xdd1ac8e0Faulting module name: KERNELBASE.dll, version: 10.0.14393.5246, time stamp: 0x62bfb6daException code: 0xe0434352Fault offset: 0x0000000000034f08Faulting process id: 0x39d0Faulting application start time: 0x01d8ae376b23c1daFaulting application path: C:\Windows\TEMP\selfunzipdir637959333067974782\LEMRSetup.exeFaulting module path: C:\Windows\System32\KERNELBASE.dllReport Id: cc2549c8-7d7b-41a9-9ea6-31b971f74b10Faulting package full name: Faulting package-relative application ID:
LEMR version 2022.8.10.923 and later requires the .Net 4.8 Framework on the system. Versions prior to this only required .Net Framework version 4.5. To confirm which version of the .Net Framework is installed on your system, please open the registry an have a look at the following key (do not edit anything in the registry):
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full
If the registry value for “Version” is less than 4.8.x, you will need to download and install the .Net 4.8 Framework to your computer. Once the new .Net is installed, LEMR will install as expected. Please contact LEMR Support if issues persist.
Link to download: https://dotnet.microsoft.com/en-us/download/dotnet-framework/net48
WARNING: The installation of .Net 4.8 will require a system reboot at the end of installation.
A prompt is displayed with Yes/No buttons. Be careful with live server systems! Close and save all open documents and ensure that the timing of the reboot won't negatively impact other users on the network.
Need Help?
LEMR customers can get help by contacting LEMR Support.