Can't co-create object / Can't find moniker | Jacob

Question

When creating an ActiveXComponent using JACOB I get the following error.

com.jacob.com.ComFailException: Can\'t co-create object
    at com.jaco         


        

Answer 1

I tried all solution and finally succeeded to crack the code related to JACOB. Create your code as per below sample code.

public static void main(String[] args) {
        String libFile = System.getProperty("os.arch").equals("amd64") ? "jacob-1.17-x64.dll" :"jacob-1.17-x86.dll";
        try{
            /**
             * Reading jacob.dll file
             */
            InputStream inputStream = certificatemain.class.getResourceAsStream(libFile);
            /**
             *  Step 1: Create temporary file under <%user.home%>\AppData\Local\Temp\jacob.dll 
             *  Step 2: Write contents of `inputStream` to that temporary file.
             */
            File temporaryDll = File.createTempFile("jacob", ".dll");
            FileOutputStream outputStream = new FileOutputStream(temporaryDll);
            byte[] array = new byte[8192];
            for (int i = inputStream.read(array); i != -1; i = inputStream.read(array)){
                outputStream.write(array, 0, i);
            }
            outputStream.close();
            /* Temporary file will be removed after terminating-closing-ending the application-program */
            System.setProperty(LibraryLoader.JACOB_DLL_PATH, temporaryDll.getAbsolutePath());
            LibraryLoader.loadJacobLibrary();

            ActiveXComponent comp=new ActiveXComponent("Com.Calculation");        
            System.out.println("The Library been loaded, and an activeX component been created");

            int arg1=100;
            int arg2=50;
            //using the functions from the library:        
            int summation=Dispatch.call(comp, "sum",arg1,arg2).toInt();
            System.out.println("Summation= "+ summation);
        }catch(Exception e){
            e.printStackTrace();
        }
}

Now let me tell you how to register your DLL. I also followed same article you mentioned but not working when you are dealing with applet.

Go to x86 framework using command line.

C:\Windows\Microsoft.NET\Framework\v2.0.50727

to register do same as

regasm.exe path_to_your_dll.dll /codebase

Don't pass any other flag except /codebase. You are done with it... Still you find any problem let me know...