Failed to set information for row X, column Y into the buffer

Hi,
We have a dtsx running on a SQL Server 2008R2 production server. The dtsx runs 90% of the time successfully but the other 10% always fail on the same error listed below 'failed to set information for row x, column y into the buffer".

We're executing incrementally, so you'd be expecting every consecutive run after the failure to fail as well. But on second runs it will execute successfully so it's not date related but something in the SSIS.

Our production machine has 64GB RAM.
Does anybody know this issue?

Message Executed as user: ********. Microsoft (R) SQL Server Execute Package Utility  Version 10.50.1600.1 for 64-bit  Copyright (C) Microsoft Corporation 2010. All rights reserved.    Started:  4:01:21 PM  Error: 2012-10-16 16:02:53.01     Code: 0x80004005     Source: Dwh_Dim_Facebook_Campaigns      Description:   End Error  Error: 2012-10-16 16:02:53.01     Code: 0xC0209013     Source: Dwh_Dim_Facebook_Campaigns Merge Join On text_ad_id [2025]     Description: Failed to set information for row 503, column 47 into the buffer. The error code returned was 0x80004005.  End Error  Error: 2012-10-16 16:02:53.01     Code: 0xC0047022     Source: Dwh_Dim_Facebook_Campaigns SSIS.Pipeline     Description: SSIS Error Code DTS_E_PROCESSINPUTFAILED.  The ProcessInput method on component "Merge Join On text_ad_id" (2025) failed with error code 0x80004005 while processing input "Merge Join Right Input" (2027). The identified component returned an error from the ProcessInput method. The error is specific to the component, but the error is fatal and will cause the Data Flow task to stop running.  There may be error messages posted before this with more information about the failure.  End Error  Error: 2012-10-16 16:02:53.10     Code: 0xC0047022     Source: Dwh_Dim_Facebook_Campaigns SSIS.Pipeline     Description: SSIS Error Code DTS_E_PROCESSINPUTFAILED.  The ProcessInput method on component "Sort According to text_ad_id" (2111) failed with error code 0xC0047020 while processing input "Sort Input" (2112). The identified component returned an error from the ProcessInput method. The error is specific to the component, but the error is fatal and will cause the Data Flow task to stop running.  There may be error messages posted before this with more information about the failure.  End Error  DTExec: The package execution returned DTSER_FAILURE (1).  Started:  4:01:21 PM  Finished: 4:02:53 PM  Elapsed:  92.181 seconds.  The package execution failed.  The step failed.