FTP Transfer Stops During Transfer (General questions)

We have a situation with a customer where FTP transfers using this client will stop in the middle of the transfer. There is no message letting us know that it has failed with the software of in the event viewer. This issue occurs more frequently with larger files and with many transfers at once.

The transfers are from Windows Server 2003 to Windows Server 2003 with IIS 6.0. There are proxies and firewalls on the network. When testing smaller files, the connection and transfer goes through fine so its odd that it happens after initial connection in the middle of a transfer. Any information is appreciated.

Jeff

Hi Jeff,

Which component are you using wodFtpDLX ActiveX or wodFtpDLX.NET component?

Also what is approximate size of file you are uploading? Are you using PutFile or PutFiles Method?

Sorry for all my questions but we have to isolate your problem somehow and try to resolve it.

Regards,
Drazen

We are using the wodFtpDLX.NET component. It uses the Put file method.

This client is used in an application that ftps a file from one server to many other servers. These files are media files, mostly .wmv files. Once the files get larger than around 8MB, then the issue can happen with them freezing. Also if multiple files are being transferred, then the issue occurs.

This issue does not occur to all over the servers the file is being transferred to, however it occurs in 40 -60 of the servers, and its not always the same servers. The transfers are also going through proxies and firewalls which probably has something to do with the issue, however we are having a hard time detecting with packet sniffers, etc.

Thanks for your help!

Hi Jeff,

I have just tried to duplicate your problem but it works for me in all cases. I didn't receive any freeze during file transfer and all files are uploaded correctly to server.

I'm testing with latest 1.4.3.136 version of wodFtpDLX.NET. Which version you are using?

You can check version using wodFtpDLX.NET Version property.[code]MsgBox(Ftp1.Version)[/code]
Can you please check which FTPS server your customer is using and receive problem and which protocol in wodFtpDLX.NET?

Also which proxy settings they are using in wodFtpDLX.NET? So we can test on our side using same environment.

What happened if they try same with some other FTPS client like FileZilla?

Let us know how it goes.

Regards,
Drazen

I can not reproduce this issue in our lab unless I disable FTP in the middle of an upload. My lab also does not have the firewalls and proxy server though.

When we have tested these same files with Filezilla on their environment we have not had any issues. This is why I think this must have something to do with the network and the software.

I will have to get back with you regarding the version number and the proxy settings, however I'm not sure that wodFtpDLX.NET has been configured at all with proxy settings, just IP Addresses.

Jeff