never mind. I fixed it by setting remotePath to session.homepath (and appending a '/' to the end if it wasn't already there).

when I use the standalone winscp.exe gui, I can upload and download files but I get 'access denied' errors calling similar functions in winscpnet.dll.

This is particular to one sftp site. the winscpnet.dll works fine at one site but the same command at another site fails. Can you compare the two logs to see why one site fails?

Any suggestions to resolve the error?