2018R2 incompatibility issue with Autocad LT24?

What messages were logged in Windows Events when the 2018R2 runtime was launched? Also take a look at tracelog.RuntimeManager.BackEnd.dat in .\Logs folder where you may find some useful information for troubleshooting.

What messages were logged in Windows Events when the 2018R2 runtime was launched? Also take a look at tracelog.RuntimeManager.BackEnd.dat in .\Logs folder where you may find some useful information for troubleshooting.

Thanks for reply"!.

The event log reports the error is with  something called ucrtbase.dll however all files checks out ok with sfc/scannow 

Log Name: Application
Source: Application Error
Date: 26.04.2023 07:30:36
Event ID: 1000
Task Category: (100)
Level: Error
Keywords: Classic
User: N/A
Computer: ****************
Description:
Faulting application name: RuntimeManager.exe, version: 8.20.0.1171, time stamp: 0x63626d73
Faulting module name: ucrtbase.dll, version: 10.0.19041.789, time stamp: 0x82dc99a2
Exception code: 0xc0000409
Fault offset: 0x0009eddb
Faulting process id: 0xa44
Faulting application start time: 0x01d978003a58d6fb
Faulting application path: C:\Program Files (x86)\AVEVA\Citect SCADA 2018 R2\Bin\RuntimeManager.exe
Faulting module path: C:\WINDOWS\System32\ucrtbase.dll
Report Id: eae44aac-e2dc-433f-80c7-bb7edfa99ad3
Faulting package full name:
Faulting package-relative application ID:
Event Xml:
<Event xmlns="">schemas.microsoft.com/.../event">
<System>
<Provider Name="Application Error" />
<EventID Qualifiers="0">1000</EventID>
<Version>0</Version>
<Level>2</Level>
<Task>100</Task>
<Opcode>0</Opcode>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2023-04-26T05:30:36.4764118Z" />
<EventRecordID>263228</EventRecordID>
<Correlation />
<Execution ProcessID="0" ThreadID="0" />
<Channel>Application</Channel>
<Computer>SC-W074.scanjet.local</Computer>
<Security />
</System>
<EventData>
<Data>RuntimeManager.exe</Data>
<Data>8.20.0.1171</Data>
<Data>63626d73</Data>
<Data>ucrtbase.dll</Data>
<Data>10.0.19041.789</Data>
<Data>82dc99a2</Data>
<Data>c0000409</Data>
<Data>0009eddb</Data>
<Data>a44</Data>
<Data>01d978003a58d6fb</Data>
<Data>C:\Program Files (x86)\AVEVA\Citect SCADA 2018 R2\Bin\RuntimeManager.exe</Data>
<Data>C:\WINDOWS\System32\ucrtbase.dll</Data>
<Data>eae44aac-e2dc-433f-80c7-bb7edfa99ad3</Data>
<Data>
</Data>
<Data>
</Data>
</EventData>
</Event>

As for the mentioned tracelog file, this file is not written at all apparently. Only older listings from prior to when this problem began, the latest being several weeks old.

Okay, Got it. It is a Windows Update that caused this problem and may not have something to do with your AutoCAD. Check out this Tech Note regarding the issue you are experiencing.

https://softwaresupportsp.aveva.com/#/knowledgebase/details/tn000035075

Hope it will help you resolving the issue.

Much tanks! This solved the problem indeed! And the link to Autocad is now also demystified: Autocad Lt2024 installs the corrupted 14.34.31931.0 version of the C++ redistributable.