Crashes when attmpting initial save settings [BUG]

[rwagnermn]

Describe the bug

Crashes/hangs when attempting to save settings during initial setup

Steps to reproduce

Expected behaviour

save configuration

Actual behaviour

Diagnostics

YWC Version    2.4.1 (released 2026-07-10)
Radio model    FTdx101MP
Band plan      Region1
Serial port    COM3 at 38400 baud
Connection     not connected
SDR device     (none configured)
DX cluster     (off)
Cluster login  (blank)
Browser        Firefox 152
.NET runtime   10.0.9
Operating sys  Microsoft Windows 10.0.19045
CPU            Intel(R) Core(TM) i5-5250U CPU @ 1.60GHz, 4 logical cores
Memory         15.9 GB
Tested fw      FTdx101MP: Main=V01-28 Display=V01-51 MainDSP=V01-20 SubDSP=V01-20 MainSDR=V02-08 SubSDR=V02-08 AFDSP=V01-00




Source
Yaesu Web Control

Summary
Stopped working

Date
‎7/‎12/‎2026 11:38 AM

Status
Report sent

Description
Faulting Application Path:	C:\Program Files\MM5AGM\Yaesu Web Control\Yaesu_Web_Control.exe

Problem signature
Problem Event Name:	APPCRASH
Application Name:	Yaesu_Web_Control.exe
Application Version:	1.5.6.0
Application Timestamp:	6a0e0000
Fault Module Name:	coreclr.dll
Fault Module Version:	10.0.926.27113
Fault Module Timestamp:	6a0e0671
Exception Code:	c0000005
Exception Offset:	0000000000356fef
OS Version:	10.0.19045.2.0.0.256.48
Locale ID:	1033
Additional Information 1:	3a08
Additional Information 2:	3a08192dfe24a0318035124c906bd020
Additional Information 3:	5a0d
Additional Information 4:	5a0d988a454c1acd5e303a13b2a0cef4

Extra information about the problem
Bucket ID:	0a8178f630625d481bc48a61d382f97b (2000876287224379771)

Screenshots / logs

(Drag-and-drop screenshots here. Any F12 console errors below.)

<img width="388" height="173" alt="Image" src="https://github.com/user-attachments/assets/672e0bc0-07a0-4269-b65f-ade5c991b1fc" />

Anything else?

[mm5agm]

Hi @rwagnermn — thanks for the report, and welcome (sorry it's a rough introduction).

This one's a genuine crash — the Windows Error Reporting details you included show it's an access violation inside coreclr.dll (the .NET runtime itself), not just an application error YWC catches and logs. Those are rarer and usually point at something specific, so the extra diagnostics below will really help pin it down.

A few things that would let me reproduce it:

1. Exact steps — you said "initial save settings": were you on a first-run flow straight after install, filling in the Settings page for the first time? Which fields had you set before clicking Save (radio model, serial port, band plan — anything else touched, even if you left it on defaults)?
2. Does it crash every time, or was it a one-off? If it's reproducible, that's the most useful thing of all.
3. YWC's own log file — even though this is a native crash, the log up to the point of the crash may show what was happening right before it. Go to %APPDATA%\MM5AGM\Yaesu Web Control\logs in File Explorer's address bar, delete (or rename) today's log file, reproduce the crash once, then attach the new log that gets created.
4. Windows Event Viewer — open Event Viewer → Windows Logs → Application, find the matching red error entry around the crash time (Source: .NET Runtime or Application Error), and paste the full text here. It sometimes includes a stack trace the WER summary doesn't show.

One odd detail from your report worth double-checking on my end too: the WER summary lists Application Version: 1.5.6.0, which doesn't match the v2.4.1 you're running — that's likely just a stale assembly-version field rather than anything you did wrong, but I'll check that it's not masking a bad build.

Thanks for bearing with the questions — access violations are the hardest kind of bug to chase without a repro, so anything you can add helps a lot.

73, Colin MM5AGM