Thanks for your report.
I have sent you an email with a debug version of WinSCP to address you have used to register on this forum.

Hi,

I am running a number of scheduled tasks on a Windows Server 2003 SP2. The tasks run batch files that run WinWSP Some times there is an application error like the following:
Faulting application WinSCP.exe, version 5.5.4.4433, faulting module WinSCP.exe, version 5.5.4.4433, fault address 0x002c097c.

After it fails it only appears fixable by restarting the server. i.e. all subsequent tasks fail.

Part of a sample batch file:

C:\Progra~1\WinSCP\WinSCP.exe /script=ToCA.cfg /log=log.xml

A sample input script file:
option batch on
echo on
open abc:xys@99.123.456.78 -timeout=60
cd sftp/Production/FromABC
put -nopermissions -nopreservetime *.txt
close
exit

W