Event Handler Data Flow fails when running package but executes successfully as an individual task.

Hi Experts,

I have created an event that contains a Data flow tasks with OLE DB source & Excel Destination.

This event is executed/triggered based on an execute SQL task failure in the control flow Sequence container.

However, when I execute the Data Flow task of the Event Handler, it runs successfully but fails when I execute the whole package.

I get the below error message:

[OLE DB Source [21]] Error: SSIS Error Code DTS_E_CANNOTACQUIRECONNECTIONFROMCONNECTIONMANAGER.  The AcquireConnection method call to the connection manager "TK463DW" failed with error code 0xC0202009.  There may be error messages posted before this with more information on why the AcquireConnection method call failed.

I have tried setting the property 'DelayValidation' to 'True' on all the Control Flow and Data Flow tasks on the package and on the Event Handler, but still I could not fix this.

Not sure What I am missing. 

Can someone please suggest.

Regards,

Shyam.