AddWatermarkFromFile in livecycle

Question

In "Converting Acrobat® JavaScript for Use in LiveCycle Designer Forms" it says that doc.addWatermarkFromFile()
Works in Livecycle designer
Does NOT have a livecycle designer equivalent
Has a ---- for LiveCycle designer javascript
Does this mean I can or can not use this command? I use this command in Version 7 to place a picture of a signature on a form. When I try to use it on a LiveCycle form (doc = event.target), the console responds with:
Exception in line 504 of function anonymous, script Folder-Level:App:config.js
(504 being the addWatermarFromFile() command)
If I open an older form (not LiveCycle), it works just fine.

Answer 1

My designer is 8.05.
Perhaps you can tell me what I'm doing wrong. Here are two methods I've tried:
Folder Level Javascript:
AddWatermark = app.trustedFunction( function ( docptr)
app.beginPriv();
docptr.addWatermarkFromFile({
cDIPath: "/C/temp/A425.jpg" (I've also tried pdf)
app.endPriv();
Menu that calls it:
app.addMenuItem({
cName: "TestDesigner",
cUser: "Test Designer Form",
cParent: "Tools",
cExec: "AddWatermark(event.target)"
In the form itself, I've added a button.
In the click action:
event.target.addWatermarkFromFile({cDIPath: "/c/temp/A425.pdf"});
I've tried wrapping the above in a beginPriv()/endPriv() but that causes an exception on the app.beginPriv()
Thank you for your help.