GUI works, .NET assembly (PoSh) times out

Hi,
I have searched the forum and other sites, and tried a few things that were suggested, but I can't shake this problem. When I use the GUI tool, my SFTP uploads work fine, but when I call the .NET assembly from my Powershell script it always times out in the middle of the upload... (the test file I've been using is 708 Kb).

I have matched the settings in the script to those in the GUI as closely as possible, and already tried the suggestion found here of setting SendBuf to 0. I am attaching my script, and logs from both the GUI and the script. Any ideas or insights will be greatly appreciated!

Many thanks,
Erik

The SessionOptions.Timeout is of type TimeSpan.
In PowerShell, if you assign a numeric value to a TimeSpan, it coverts to "ticks". 1 tick = 1/10000000 second. You effectively set zero timeout.
You may want to use SessionOptions.TimeoutInMilliseconds = 15000.

Or have WinSCP generate the code for you:
https://winscp.net/eng/docs/ui_generateurl#code

Changing to TimeoutInMilliseconds seems to have resolved the issue in my test script, I will update the prod script and wait for the next scheduled run to confirm. Thank you!