Save as Trusted Function

I'm trying to run a batch that will perform a Save As. I understand that Save As must be executed as a trusted function and place as a folder leverl javascript.

Here is my Javascript:

// Save As EPS function
var saveAs = app.trustedFunction(
function()
{
app.beginPriv();
var name = this.documentFileName;
var n = name.split(".");
this.saveAs({
cPath: "/c/junk/test/in/" + n + ".eps",
cConvID: "com.adobe.Acrobat.eps"
});
app.endPriv();
}
);

When I call the saveAs() function in my batch I get the following error message:

MissingArgError: Missing required argument.
this.saveAs:1:Batch undefined:Exec
===> Parameter cPath.

Any help would greatly be appreciated.