Can't use Excel dll on AppHarbor

Question

I'm having trouble with uploading an excel file to AppHarbor and then opening it, even though it works fine locally. I am uploading the file to App_Data and have the AppHarbor settings set to write to file directory. The file actually is uploaded ok (I think), however when I try to use the Excel dll:

var excel = new Application();

It generates this error:

System.Runtime.InteropServices.COMException (0x80040154): Retrieving the COM class factory for component with CLSID {00024500-0000-0000-C000-000000000046} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)). at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck)

I have a reference to Microsoft.Office.Interop.Excel in my project, and even tried copying it locally and referencing it there. Any ideas?

Is Excel installed in AppHarbor? I'm guessing not, since MS specifically recommends against doing that... — Tim Williams

Tim Williams Tim Williams · Accepted Answer · 2012-08-22T20:07:57

The Interop libraries only serve as an interface to the Excel application, which must be installed wherever your code is running. Seems it's not available on AppHarbor.

Can't use Excel dll on AppHarbor

1 Answers