Running executable program with no UI from windows service

Question

I am running a console application with no UI and generate thumbmail images from pdf files. The compile file for this application works fine. However I have to call this compile file from windows service application that implement the the FileSystemWatcher class to detect when new pdf files are uploaded into the directory.

and I am using the suggestion from this link How to run console application from Windows Service?

ProcessStartInfo info = new ProcessStartInfo(appName);
info.UseShellExecute = false;
info.RedirectStandardError = true;
info.RedirectStandardInput = true;
info.RedirectStandardOutput = true;
info.CreateNoWindow = true;
info.ErrorDialog = false;
info.WindowStyle = ProcessWindowStyle.Hidden;

Process process = Process.Start(info);

if (!process.HasExited)
{
   LogEvent(process.ProcessName + "has started and called Thumbnail application");
}
 else
{ LogEvent(process.ProcessName + "has been terminated"); }

I can see the process involking the "pdfThumbnail.exe" but I am getting this error when the application try to execute.

"System.Exception: Cannot create ActiveX component. at Microsoft.VisualBasic.Interaction.CreateObject(String ProgId, String ServerName) at PDFThumbnailCsharp.Main(String[] args) "

As I have said above the pdfThumbnail.exe execute fine when i run the exe file.

Updates

This is the error from the SysInternals' Process Monitor

The machine-default permission settings do not grant Local Activation permission for the COM Server application with CLSID {FF76CB60-2E68-101B-B02E-04021C009402} and APPID Unavailable to the user NT AUTHORITY\LOCAL SERVICE SID (S-1-5-19) from address LocalHost (Using LRPC). This security permission can be modified using the Component Services administrative tool.

I have changed the ownership of this CLSID to Administrator with Full control as described on this link http://social.technet.microsoft.com/Forums/en-US/windowsserver2008r2general/thread/e303c7e1-16de-42fd-a1a4-7512c1261957

However I am still getting the same error.

Any help will be appreciated.

Thanks

Answer 1

This CLSID {FF76CB60-2E68-101B-B02E-04021C009402} is for Acrobat.Excha.PDDoc on my computer registry. Further investigation with Acrobat on this link https://forums.adobe.com/thread/1467460 revealed that Acrobat cannot be run from service.

What I have done for now until I have a better approach is to create a windows Task Scheduler that listen to an event raised by the windows service when new pdf are created and then trigger the console app that create the thumbnails.