Blank File when uploading via Task Scheduler

Hi there,
I work for a local council and we are using WInSCP alongside Task Scheduler to upload a daily file to an external organisations FTP site.

We have been informed that when they receive the file it is completely blank. The file in question is a CSV file.

Strangely if I manually place the same file into the "In" folder of the organisations FTP site, they receive the file correctly with all relevant information inside of it.

Can anyone offer any suggestions as to why the file is coming out blank via an automated task but uploading correctly if manually uploaded.

thanks in advance

Ben

Please attach full session log files for both scenarios.