AD RMS Managed Code Error The system cannot find the file specified. HRESULT: 0x80070002

Question

I'm new to Active Directory Rights Management Services (AD RMS) and I'm developing an application to use AD RMS to encrypt some documents. I'm using the interop example and I get the error - The system cannot find the file specified. HRESULT: 0x80070002 - when I try to run the code below:

I get the error when I try to run this statement:

Collection ipcTemplates = IPC.GetTemplates();

internal static class IPC
{
     static IPC()
     {
          SafeNativeMethods.IpcInitialize();
     }

     public static Collection<TemplateInfo> GetTemplates()
     {
          Collection<TemplateInfo> templates = null;

          try
          {
               templates = SafeNativeMethods.IpcGetTemplateList(null, true, true,
                                false, false, null, null);
          }
          catch (Exception /*ex*/)
          {
              /* TODO: Add logging */
              throw; 
          }

          return templates;
     }
}

Stack Trace:

The system cannot find the file specified. HRESULT: 0x80070002 at Microsoft.InformationProtectionAndControl.SafeNativeMethods.ThrowOnErrorCode(Int32 hrError) in c:\Microsoft.InformationProtectionAndControl\SafeNativeMethods.cs:line 1678 at Microsoft.InformationProtectionAndControl.SafeNativeMethods.IpcGetTemplateList(ConnectionInfo connectionInfo, Boolean forceDownload, Boolean suppressUI, Boolean offline, Boolean hasUserConsent, Form parentForm, CultureInfo cultureInfo) in c:\Microsoft.InformationProtectionAndControl\SafeNativeMethods.cs:line 137 at IPC.GetTemplates() in c:\IPC.cs

Also, I have set up a post build event to make sure the manifest file gets created every time the code is compiled. The application is a WCF service hosted in a windows service. I have a very simple console app that works.

Any help in resolving this error and any AD RMS examples using managed code would be appreciated :)

Answer 1

For anyone else that may run into this issue I was able to resolve my problem by adding SafeNativeMethods.IpcSetAPIMode(APIMode.Server); to my static constructor like this:

static IPC()
    {
        SafeNativeMethods.IpcInitialize();
        SafeNativeMethods.IpcSetAPIMode(APIMode.Server);
    }