A number of times now I have come across this error "Exception from HRESULT: 0xC0010009".  It seems to happen when I change something up stream in the data flow.  When this happens I can delete the task, but when I try to re-add the task I get:

The component could not be added to the Data Flow task. Verify that this component is properly installed. Component information:
Name: 'Error Description'
Class ID: 'Pestre.SqlServer.SSIS.DataFlowComponent.ErrorOutputDescription, ErrorOutputDescription, Version=2.0.0.0, Culture=neutral, PublicKeyToken=97ab4c916d7328ad'
File Name: 'ErrorOutputDescription'
File Version: '2.0.0.0' .
Could not initialize component for use in the designer.
Please verify that this component is properly installed.

My only option at this point is to scrap the entire package and start over.  Very frustuating!!  Has anybody else come across this?

Can somebody please help?

I've found a work around for anybody else who has this issue.  Before I can change anything in a data flow with EOD I must first delete the EOD component and anything down stream from it.  It's a bit of a hassle, but it works.

I found recompiling resolved this. Maybe related to SqlServer service packs?

rockresolve, what do you mean by "recompiling"... The ErrorOutputDescription DLL?

Eric, yes recompiling the source code in VS.

How often do you have to do that?

Is it just a one-off before installing the DLL?

Just the once.