Script throw error when run from java code

[tauruzian]

#include <WinAPIShPath.au3>
#include <Array.au3>
#include <File.au3>

Global $file = "filenamectt.txt"
FileOpen($file, 0)

For $i = 1 to _FileCountLines($file)
    Global $line = FileReadLine($file, $i)
;msgbox(0,'', $line)
Next
FileClose($file)
 Global $aDays = StringSplit($line, "::")
Global $fileName = $aDays[1]
;Local $aCmdLine = _WinAPI_CommandLineToArgv($CmdLineRaw)
WinActivate($fileName)
;MsgBox (0,"Details",$fileName)
Send("^c")

I used above code to activate my document. It working fine when I run from AutoIt editor, fine when I execute from CMD. When I try to run from my Java project as 

public void run_getPDFClipPdf1b() {
        try {
          //  Runtime.getRuntime().exec("C:\\project\\autoit\\PDF_Clip_PDFParam.exe "+param1+"");
           Runtime.getRuntime().exec("exe\\PDF_Clip_PDFParam_2.exe");
           // System.out.println("thread is running...");
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

it shows error like image below:

Please advice where I did wrong. 

Edited July 8, 2015 by tauruzian

[BrewManNH]

Declare the $line variable outside of (before) the For loop. _FileCountLines needs a path and file name, you're passing it a file handle which won't work with that function.

Also, $line will only contalin the last read line of the file the way you have it set up, if that's what you're looking for, that's fine, but just be aware.