WinSCP 1.3.6.7136 Error = 75 -- Path/file access error problem, please help

I am using VBScript to try and uplaod a file but during Session.Open it fails with this error :

Error = 75 -- Path/file access error

I cannot seem to find any information on Error 75 and how to fix it

I am attaching a tracelog and debug and would appreciate any help I can get.

Apologies for wasting any time. I was caught out by the calling sub route having lots of On Error Goto and Resume Next. This set the Err value prior to calling WinSCP and I test for Err <> 0 and hence fell into this trap. Simplest fix in the world I set Err = 0 entering the WinSCP calling routine. A very large DOH !!!