Acrobat COM Error

Question

Hi,
I am working on a reporting application (C#) which uses the Acrobat
SDK. It's been deployed for about a week now on the end users'
machines and today they started getting the following error:
Message: Unable to cast COM object of type 'Acrobat.AcroPDDocClass' to
interface type 'Acrobat.CAcroPDDoc'. This operation failed because the
QueryInterface call on the COM component for the interface with IID
'{9B4CD3E7-4981-101B-9CA8-9240CE2738AE}' failed due to the following
error: No such interface supported (Exception from HRESULT: 0x80004002
(E_NOINTERFACE)).
I googled the above error but got nothing. Anyone else seen this issue
before? As far as I knew AcroPDDocClass inherited from the interface
CAcroPDDoc and so the type conversion was valid.
I can't give you the whole code of that section, but here's a snippet.
The error points to the line with apddc.Open() which is weird because
there is no type conversion going on there.
string sTempExportFile = ...
AcroPDDocClass apddc = new AcroPDDocClass();
apddc.Open(sTempExportFile);
Acrobat.CAcroPDPage pdpage = apddc.AcquirePage(0) as
Acrobat.CAcroPDPage;
Acrobat.CAcroPoint point = pdpage.GetSize() as Acrobat.CAcroPoint;

Answer 1

I can get your code to run (more or less ) here is the code I use
string sTempExportFile = ......;
CAcroPDDocClass apddc = new AcroPDDocClass();
apddc.Open ( sTempExportFile);
I don't if the Missing 'C' at the start of CAcroPDDocClass is just a typo in the post or the problem.
HTH
Malky