Crashes when changing datatypes

[daxxx]

When in 'Show data' screen and clicking on another datatype in 90% of all cases the program just exits without giving an error.
It gets more likely when length gets greater.

OS: Windows 11

[sanny32]

To reproduce bug need more information. Please give me steps to reproduce bug

[daxxx]

Connect to a modbus. Open Show data. Set length to greater than 100. Change data types. Alexandr Ananev ***@***.***> schrieb am Mi., 5. März 2025, 11:05:

…

To reproduce bug need more information. Please give me steps to reproduce bug — Reply to this email directly, view it on GitHub <#33 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAXW5AIQDWVY2XLHE4SGWCT2S3D6VAVCNFSM6AAAAABYLR2KXOVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDOMBQGQ2DGMBQGQ> . You are receiving this because you authored the thread.Message ID: ***@***.***> [image: sanny32]*sanny32* left a comment (sanny32/OpenModScan#33) <#33 (comment)> To reproduce bug need more information. Please give me steps to reproduce bug — Reply to this email directly, view it on GitHub <#33 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAXW5AIQDWVY2XLHE4SGWCT2S3D6VAVCNFSM6AAAAABYLR2KXOVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDOMBQGQ2DGMBQGQ> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[sanny32]

What version do you use?
Are you connecting to modbus rtu or modbus tcp?
Which data do you receive from modbus server (screenshot)?
May be can you add video?

[daxxx]

I really tried but now i can't reproduce.
Maybe there were some conflicts with other modbus tools reading from the same tcp-server. Felt like a issue with converting the data while the response was parsed. I'll try to reproduce the exact setup and do a video.

[Afroboltski]

I have this bug sometimes too, when using the "show traffic" option.

Below are Windows Error Report logs. The problem appears to be a low-level segmentation faut-type of error, e.g. maybe Access Violation Exception. Exception code 0xc0000374 is "Heap Corruption", so maybe a buffer overrun as daxxx said.

Faulting application name: omodscan.exe, version: 1.7.0.0, time stamp: 0x65f146c4
Faulting module name: ntdll.dll, version: 10.0.19041.5438, time stamp: 0xab0dece3
Exception code: 0xc0000374
Fault offset: 0x00000000000ff3c9
Faulting process id: 0x3924
Faulting application start time: 0x01db96cc915ef272
Faulting application path: C:\Program Files\Open ModScan\omodscan.exe
Faulting module path: C:\Windows\SYSTEM32\ntdll.dll
Report Id: 14f8c7ec-c2ca-40f5-88b9-f4403fa8cae2
Faulting package full name: 
Faulting package-relative application ID: 

Fault bucket 2244770124576194464, type 4
Event Name: APPCRASH
Response: Not available
Cab Id: 0

Problem signature:
P1: omodscan.exe
P2: 1.7.0.0
P3: 65f146c4
P4: StackHash_2d13
P5: 10.0.19041.5438
P6: ab0dece3
P7: c0000374
P8: PCH_81_FROM_ntdll+0x000000000009E044
P9: 
P10: 

Attached files:
\\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WEREEA1.tmp.dmp
\\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WEREF3F.tmp.WERInternalMetadata.xml
\\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WEREF5F.tmp.xml
\\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WEREF5F.tmp.csv
\\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WEREF7F.tmp.txt

These files may be available here:
\\?\C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_omodscan.exe_3e55a677899395b62ef8e149bba9903295e65ff_4d2d5258_f85a443e-6419-403d-8d7b-fb49053f9a68

Analysis symbol: 
Rechecking for solution: 0
Report Id: 14f8c7ec-c2ca-40f5-88b9-f4403fa8cae2
Report Status: 268435456
Hashed bucket: fe03f6be10a698041f270688f5c5ffa0
Cab Guid: 0

Fault bucket 2227765310916770155, type 5
Event Name: FaultTolerantHeap
Response: Not available
Cab Id: 0

Problem signature:
P1: omodscan.exe
P2: 1.7.0.0
P3: 65F146C4
P4: ffffbaad
P5: 
P6: 
P7: 
P8: 
P9: 
P10: 

Attached files:
\\?\C:\Windows\SERVIC~1\LOCALS~1\AppData\Local\Temp\FTHEE05.tmp\fthempty.txt
\\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WEREE25.tmp.WERInternalMetadata.xml
\\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WEREE55.tmp.xml
\\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WEREE53.tmp.csv
\\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WEREE73.tmp.txt

These files may be available here:


Analysis symbol: 
Rechecking for solution: 0
Report Id: 4da563a2-5f78-4bad-ab90-d3fa1ae9985f
Report Status: 268435456
Hashed bucket: 74276b369c09e7cedeea9cbf4021b96b
Cab Guid: 0