Execute Package Task Often Fails For FlatFile Connection -- Very Hard To Troubleshoot

I have a simple parent package that calls 3 small simple child packages (child1, child2, and child3). Each child package does nothing but contains a FlatFile connection. I run these 3 child packages in parallel inside parent package. The parent package fails sometimes (i.e. sometimes success, but sometimes failed). And the failure is replicable.

I would like to send you all of 4 simplest packages via email if anyone is interested in helping out.



Here is the error info




Code Snippet

SSIS package "parent.dtsx" starting.

Executing ExecutePackageTask: C:SSISDasLoaderchlid3.dtsx

Executing ExecutePackageTask: C:SSISDasLoaderchld2.dtsx

Executing ExecutePackageTask: C:SSISDasLoaderchild1.dtsx

Error: 0xC0014005 at : The connection type "FLATFILE" specified for connection manager "_MedicalClaimServiceLine_070713_161742152820" is not recognized as a valid connection manager type. This error is returned when an attempt is made to create a connection manager for an unknown connection type. Check the spelling in the connection type name.

Error: 0xC0010018 at : Error loading value "<DTS:ConnectionManager xmlns:DTS="www.microsoft.com/SqlServer/Dts"><DTS:Property DTS:Name="DelayValidation">0</DTS:Property><DTS:Property DTS:Name="ObjectName">_MedicalClaimServiceLine_070713_161742152820</DTS:Property><DTS:Property DTS:Name="DTSID">{CA12C" from node "DTS:ConnectionManager".

Error: 0xC00220DE at child2: Error 0xC0010014 while loading package file "C:SSISDasLoaderchld2.dtsx". One or more error occurred. There should be more specific errors preceding this one that explains the details of the errors. This message is used as a return value from functions that encounter errors.

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Task failed: child2

Warning: 0x80019002 at parent: SSIS Warning Code DTS_W_MAXIMUMERRORCOUNTREACHED. The Execution method succeeded, but the number of errors raised (3) reached the maximum allowed (1); resulting in failure. This occurs when the number of errors reaches the number specified in MaximumErrorCount. Change the MaximumErrorCount or fix the errors.

Information: 0x40016042 at chlid3: The package is attempting to configure from the parent variable "z".

Information: 0x40016042 at child1: The package is attempting to configure from the parent variable "x".

Information: 0x4004300A at Data Flow Task, DTS.Pipeline: Validation phase is beginning.

Information: 0x4004300A at Data Flow Task, DTS.Pipeline: Validation phase is beginning.