WinSCP crashes when downloading a large number of files :: Support Forum

orztrickster
Joined:: 2025-08-21
Posts:: 4

WinSCP crashes when downloading a large number of files

2025-08-21 02:24

When I use WinSCP to download a large number of patent files (possibly around 500,000 files), the program crashes and closes by itself. I checked the program’s log file but did not see any error messages. However, when I open the Windows Event Viewer, I can notice that the software crashes due to some reason.

Windows Event Viewer :

- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/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="2025-08-20T15:36:17.4189771Z" /> 
  <EventRecordID>111504</EventRecordID> 
  <Correlation /> 
  <Execution ProcessID="0" ThreadID="0" /> 
  <Channel>Application</Channel> 
  <Computer>orztrickster-004</Computer> 
  <Security /> 
  </System>
- <EventData>
  <Data>WinSCP.exe</Data> 
  <Data>6.5.3.16364</Data> 
  <Data>00000000</Data> 
  <Data>KERNELBASE.dll</Data> 
  <Data>10.0.19041.5607</Data> 
  <Data>b51907a8</Data> 
  <Data>0eefface</Data> 
  <Data>001420c2</Data> 
  <Data>416cc</Data> 
  <Data>01dc11a907fe9f80</Data> 
  <Data>C:\Program Files (x86)\WinSCP\WinSCP.exe</Data> 
  <Data>C:\Windows\System32\KERNELBASE.dll</Data> 
  <Data>ea392098-bff1-4b9d-a9ab-bc7499580bb8</Data> 
  <Data /> 
  <Data /> 
  </EventData>
  </Event>

WinSCP.log :

. 2025-08-20 23:36:16.853 [Background 1] Type=dir;Modify=20211104203307.467; 1919202137864
. 2025-08-20 23:36:16.853 [Background 1] Type=dir;Modify=20211104203311.749; 1919202137865
. 2025-08-20 23:36:16.853 [Background 1] Type=dir;Modify=20211104203317.294; 1919202137866
. 2025-08-20 23:36:16.853 [Background 1] Type=dir;Modify=20211104203318.663; 1919202137867
. 2025-08-20 23:36:16.853 [Background 1] Type=dir;Modify=20211104203320.451; 1919202137868
. 2025-08-20 23:36:16.853 [Background 1] Type=dir;Modify=20211104203322.454; 1919202137869
. 2025-08-20 23:36:16.853 [Background 1] Type=dir;Modify=20211104203325.623; 1919202137870
. 2025-08-20 23:36:16.853 [Background 1] Type=dir;Modify=20211104203326.673; 1919202137871
. 2025-08-20 23:36:16.853 [Background 1] Type=dir;Modify=20211104203327.715; 1919202137872
. 2025-08-20 23:36:16.853 [Background 1] Type=file;Size=13828419;Modify=20211104181430.955; index.xml
. 2025-08-20 23:36:16.853 [Background 1] Type=file;Size=16220;Modify=20210302100040.359; invention-specification.dtd
. 2025-08-20 23:36:16.853 [Background 1] Type=file;Size=34015905;Modify=20211105185746.680; index_all.xml
< 2025-08-20 23:36:16.853 [Background 1] 226 Transfer complete. 113884 bytes transferred. 11.83 KB/sec.

sitemanager.xml (486 Bytes, Private file)

Description: This file can be used to import patent office data. I am downloading all the files located in the folder \InventionPubXML\110\, and the error occurs every time.

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orztrickster
Joined:: 2025-08-21
Posts:: 4

WinSCP.exe log

2025-08-21 03:19

These are compressed log files. Since the files are too large, I split them into several parts. They are in 7z archive format. The filenames should end with 001–003, but because files with 001–003 extensions could not be uploaded, I added “.7z” to the end of each filename.

專利局.7z.003.7z (1.43 MB, Private file)

專利局.7z.002.7z (10 MB, Private file)

專利局.7z.001.7z (10 MB, Private file)

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martin◆ Site Admin
Joined:: 2002-12-10
Posts:: 42,505
Location:: Prague, Czechia

Re: WinSCP crashes when downloading a large number of files

2025-08-22

Thanks for your report.
I have sent you an email with a debug version of WinSCP to the address you have used to register on this forum.

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orztrickster
Joined:: 2025-08-21
Posts:: 4

WinSCP Log

2025-08-23 01:28

These are compressed log files. Since the files are too large, I split them into several parts. They are in 7z archive format. The filenames should end with 001–080, but because files with 001–080 extensions could not be uploaded, I added “.7z” to the end of each filename.

<attachments deleted by admin>

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martin◆ Site Admin

Re: WinSCP Log

2025-08-23

Please respond to my email with the log attached in one piece.

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orztrickster

2025-08-23 07:03

The file has been sent to you via email

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hakluk Donor
Joined:: 2025-09-16
Posts:: 2
Location:: Czech

2025-09-16 11:57

Hi, I'm reporting the same issue, my version is 6.5.3. Please let me know when it's fixed. Thank you.

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martin◆ Site Admin
Joined:: 2002-12-10
Posts:: 42,505
Location:: Prague, Czechia

2025-09-18

@hakluk: There's a 2GB per-process limit for 32-bit processes. And WinSCP has reached that limit for @orztrickster. You possibly have the same problem.

I'm working on upgrading WinSCP to 64-bit:
Issue 618 – 64-bit version of WinSCP
And also there's a way to allow 32-bit process using 4GB. I'll look into it too.

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