[SOLVED] Winscp .Net assembly - Error transferring file :: Support Forum

glannes
Joined:: 2020-11-26
Posts:: 9

[SOLVED] Winscp .Net assembly - Error transferring file

2020-11-26 10:26

Hello,

We receive files on our system , rename it and send through SFTP using WinSCP .NET assembly. We use WinSCP in a PowerShell script.

Sometimes when we received two files in the sametime, we have this error message:

'SourcePath'. Copying files to remote side failed. Can't open data connection for transfer of "/FILENAME_date_hours""

Do you have any idea that what is happened ?

Regrds,

Last edited by glannes on 2021-02-03 16:09; edited 1 time in total

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martin◆ Site Admin
Joined:: 2002-12-10
Posts:: 41,442
Location:: Prague, Czechia

Re: Winscp .Net assembly - Error transferring file

2020-11-27

Please attach a full session log file showing the problem (using the latest version of WinSCP).

To generate the session log file, set Session.SessionLogPath. Submit the log with your post as an attachment. Note that passwords and passphrases not stored in the log. You may want to remove other data you consider sensitive though, such as host names, IP addresses, account names or file names (unless they are relevant to the problem). If you do not want to post the log publicly, you can mark the attachment as private.

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glannes
Joined:: 2020-11-26
Posts:: 9

Winscp .Net assembly - Error transferring file

2020-11-27 13:02

Hello Martin,
I will post you the session log when the problem occurs again.
Is there a risk of having a message like "process used" if the log session is called several times at the same time?
Regards

Guillaume

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martin◆ Site Admin

Re: Winscp .Net assembly - Error transferring file

2020-12-01

If you run multiple processes in parallel, each should log to an unique log file.

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glannes
Joined:: 2020-11-26
Posts:: 9

Winscp .Net assembly - Error transferring file

2020-12-10 09:42

Hello,
Please find the log generated by the SessionDebugLog.
Could you help me to understand why it failed?
Regards,

winscpFODLE00400002_10122020_9323065.log (101.71 KB, Private file)

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martin◆ Site Admin

Re: Winscp .Net assembly - Error transferring file

2020-12-11

I was asking for Session.SessionLogPath. You have posted Session.DebugLogPath.

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glannes

Re: Winscp .Net assembly - Error transferring file

2020-12-11 11:22

I change the command in my PS script, i will post you in case of error.

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glannes
Joined:: 2020-11-26
Posts:: 9

Winscp .Net assembly - Error transferring file

2021-01-07 09:38

Hello ,

Please see the error file

winscpFODLE00400003_07012021_9330248.log (9.14 KB, Private file)

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martin◆ Site Admin

Re: Winscp .Net assembly - Error transferring file

2021-01-08

I have asked for Session.SessionLogPath, you have posted Session.DebugLogPath (there's no SessionDebugLog).

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glannes

Re: Winscp .Net assembly - Error transferring file

2021-01-08 11:21

What??? no it's session LogPath. Could you share me what do you see in the file ?

In the file, i have PASV line , Port line etc..

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martin◆ Site Admin
Joined:: 2002-12-10
Posts:: 41,442
Location:: Prague, Czechia

Re: Winscp .Net assembly - Error transferring file

2021-01-08

Sorry, my mistake, I was reading your old posts.

It might be a firewall issue. Your server has some problems with the passive mode, so WinSCP falls back to the active mode. You might not have all the active mode ports open in your local firewall. See https://winscp.net/eng/docs/ftp_modes#active
Though better would be to get your FTP server fixed to support the passive mode.

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glannes

Winscp .Net assembly - Error transferring file

2021-01-08 11:59

Where is the problem?

On our side or on the remote side ?

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martin◆ Site Admin

Re: Winscp .Net assembly - Error transferring file

2021-01-08

Both. The passive mode problem is on the remote side.
And the active mode problem is probably on your side.

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glannes
Joined:: 2020-11-26
Posts:: 9

[SOLVED] Winscp .Net assembly - Error transferring file

2021-02-03 16:09

Hello,
For your information,
the problem was in the remote side. It was a router badly dimensioned and constantly at 100% CPU that can cause IP losses.
Thanks a lot for your help
Have a nice day

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