Issue accessing shared folder

Hi Team,

I have a script to access shared director but its not working I getting error "Failed to add a new network location from "

Can you help me on this the code is given below

what does if (!("Z:" | %{Test-Path "$($_)" -pathType Container})) mean

thanks 

Raees

#Access SQL Server package from shared directory

if ($MSSQL_SETUP_LOCATION_ACCESS_USER -eq "") {

    net.exe use Z: $MSSQL_SETUP_LOCATION

} else {

    net.exe use Z: $MSSQL_SETUP_LOCATION $MSSQL_SETUP_LOCATION_ACCESS_PASSWORD /user:$MSSQL_SETUP_LOCATION_ACCESS_USER

}

#Check the SQL Server 2012 Enterprise Edition installation files

if (!("Z:" | %{Test-Path "$($_)" -pathType Container})) {

    echo "Failed to add a new network location from $MSSQL_SETUP_LOCATION."

    Exit 1

}

if (!("Z:\setup.exe" | %{Test-Path "$($_)" -pathType Leaf})) {

    echo "Cannot find the setup.exe file of SQL Server 2012 Enterprise Edition."

    Exit 1

}