I keep receiving security errors when trying to open a pdf.

Question

I keep receiving a security error when trying to run my javascript program, the function previously worked, but now creates an error after I entered the addWaterMark function. I have put my whole code below for my script.
The basic function is to load a text file into an array which has the path and file location, open the document, add a watermark, save the file, close the file, then repeat for the next array position.
I am using Acrobat Standard so I am unable to debug using the console, therefore I am struggling to understand what I am doing wrong. I will point out that I am not a fluent programmer, only have a basic knowledge of programming.
Code
app.addSubMenu(
  cName:"Extras",
  cParent:"Edit"
app.addMenuItem(
  cName:"Import File",
  cParent:"Extras",
  cExec:"main()"
function main()
  var fileCount = 0
  var listOfFiles = []
  listOfFiles = importData()
  amountOfFiles = listOfFiles.length
  for (var i =0; i<listOfFiles.length; i++)   //calculates amount of entries in the array listOfFiles
  newFile = openFile(listOfFiles[i]) //Opens current file
  var d = app.activeDocs; //Gets current document title name 
  addWater(d[0]);
  app.execMenuItem("Save");
  for( var x in d ) d[x].closeDoc();
function addWater(myName)
{ app.alert("watermark",0);
  myName.addWatermarkFromText(
  cText: "OBSOLETE",
  cFont: "Arial",
  nFontSize:36,
  aColor: color.red,
  nOpacity: 0.5
//function SaveFile saves the current file but with an addition of WM to the filename
saveFile = app.trustedFunction(function(currentDoc, currentFileName)
  { app.alert("savefile",0);
  app.beginPriv();
  currentDoc.saveAs(currentFileName);
  app.endPriv();
//function openFile which opens the file named in the variable currentFilename
openFile = app.trustedFunction(function(currentFileName)
  {app.alert("openfile" + currentFileName,0);
  app.beginPriv();
  app.openDoc(currentFileName);
  app.endPriv();
//importData function imports the paths and filenames contained in the list.txt located on the desktop
importData = app.trustedFunction(function()
  {app.alert("import",0);
  app.beginPriv();
  cFilePath = "/C/Users/103019944/Desktop/File_List.txt";
  var stmData = util.readFileIntoStream(cFilePath);
  var cData = util.stringFromStream(stmData);
  var cMsg = cData;
  var fileArray = cMsg.split("\r\n");
  for (var i =0; i<fileArray.length; i++)
  return(fileArray);
  app.endPriv();

Answer 1

I have found the error, you are quite correct I had an extra letter in the filename, I thought I'd checked this but just shows that sattention to detail is the key.
The script works perfectly now, thanks you for your help, really appreciated.
Thanks again
Ben