Re: APCC app crash when parking mount (Mach1) - event viewer details #APCC

Joe Zeglinski

Hi Ray,
    FYI. To your point #4, no need to find one. Recall that there is a Windows provided off-line memory test – under START->ADMINISTRATIVE TOOLS –> “Windows Memory Diagnostic”.
    The user can run a single pass which would take something like 20 minutes depending on memory size, or change the on-screen  option for multiple reruns, perhaps for hours, until (maybe) a failure finally comes up, due to maybe a memory module  or case temperature heat. The results of the run will pop up shortly after the program reboots Windows, and will also be found inside the Notifications icon.
Joe Z.

From: Ray Gralak
Sent: Wednesday, September 9, 2020 9:31 AM
Subject: Re: [ap-gto] APCC app crash when parking mount (Mach1) - event viewer details #APCC
Hi Rodolphe,

> Faulting module name: ntdll.dll, version: 10.0.19041.423, time stamp: 0x6e329152

Your info indicates the crash occurred in ntdll.dll, an operating system DLL, which means it is not actually APCC that caused the crash.

Windows potentially is out of date, or corrupted. It also could be your system memory could have had an error (one or more bits changed).

1. Which version of Windows are you running? (run from a command prompt: "WinVer")

2. Run cmd.exe "as administrator", then check your O/S by typing "sfc.exe /scannow"

3. Run Windows update and apply all updates.

4. Find and download a memory checker to determine if there is a problem with memory on your system. If there is a problem, you should try reseating your dynamic RAM modules.

5. Many of the links with ntdll.dll crashes suggest to try unregistering and re-registering the ntdll.dll. For example:

-Ray Gralak
Author of PEMPro
Author of APCC (Astro-Physics Command Center):
Author of Astro-Physics V2 ASCOM Driver:

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