error Session.ExecuteCommand runing scripts /etc/reload.sh

hi, i have error runing script from Session.ExecuteCommand
the script run but i get a error on the winscp

Step into: Stepping over non-user code 'string.Format'
Step into: Stepping over non-user code 'WinSCP.Session.ExecuteCommand'

and the apps hangs waiting for the response.

onether example:

Dim reload_val As String = String.Format("val reload")
Session.ExecuteCommand(reload_val)

Can you post a complete error you are getting?