Navigating Datasets on IBM Host does not work

Hi everyone,

currently trying to access datasets on IBM Host via WinSCP (GUI and .com). Unfortunately this does not work. So when I login and do something like navigating on UI or via cd to any dataset in the form of: XZ.....Z.S55.....ARCH. it works fine. But as soon as I try it a second time I always get the error:
What is the problem here? Cannot use Filezilla (which works always fine) since I need some automation. ftp.exe is also not an option since I need automation and script support.
Any idea on how to tackle this?

Thank you in advance for your help and
Kind Regards

Seems I found at least one hint:

When I delete the application data by using the UI built in tool for deleting them in between 2 calls of WinSCP.com then it works everytime. So it seems it is somehow related to the application data which is getting stored when executing WinSCP.com.

Sorry for mass posting - do not (yet) have an account here.

Applying the parameter /ini=nul seems to work though.