FTP task - StopOnFailure not working as I expect?

Hi

I'm using an FTP task in a loop to download files from a WAN based FTP server. I've got a script to generate the name of the file I require and place into a variable. Problem is sometimes some of the remote files haven't been published so the FTP component errors and the package fails.

I tried setting StopOnFailure to False - all I get is the following errors

[FTP Task] Error: File represented by "User::RemotePath" does not exist.
[FTP Task] Error: Attempt to read message string for 0x80020918 failed with error 0xc02090f3. Make sure all message related files are registered.

What I want to do is ignore the error and perform the next loop iteration

Is this a bug, or am I missing something

Dave

To ignore the ftp task error within a loop, put an OnError event handler on the FTP task. In the handler, set the System::Propagate variable to false. This setting will keep the error(s) in the ftp task from bubbling up the container hierarchy, and thus keep the loop from failing on a missing file.

For example:

Imports Microsoft.SqlServer.Dts.Runtime

Public Class ScriptMain
Private vars As Variables
Public Sub Main()
Dts.TaskResult = Dts.Results.Success
Dts.VariableDispenser.LockForWrite("System::Propagate")
Dts.VariableDispenser.GetVariables(vars)
vars("System::Propagate").Value = False
vars.Unlock()
End Sub
End Class

P.S. Another way to ignore the ftp error is by configuring the MaximumErrorCount property on the loop executable to some relatively high number.
|||Excellent thanks, I initially set the MaximumErrorCount as a quick hack but thanks for the first suggestion - I've been meaning to figure out how OnError works.

|||

This sounds like the perfect solution for what I'm trying to do... but one question:

How do you "put an OnEvent handler on the ftp task"?

Not sure what this means.

Thanks much!!

|||

Ok, I figured out the event handler tab functionality.

So, for my FTP task, I created an OnError event handler. I put a script task in the event handler.

Imports Microsoft.SqlServer.Dts.Runtime

Public Class ScriptMain
Private vars As Variables
Public Sub Main()
Dts.TaskResult = Dts.Results.Success
Dts.VariableDispenser.LockForWrite("System:ropagate")
Dts.VariableDispenser.GetVariables(vars)
vars("System:ropagate").Value = False
vars.Unlock()
End Sub
End Class

However, the FTP task is still failing as before, and failing the ForLoop container with it.

What am I doing wrong?

Thanks

|||

Hello,

I am still trying to figure out why FTP the error is still "bubbling up" to the ForLoop container?

This is what I have:

ForLoop [ FTP task --> script task ]

In the FTP task Event Handler tab, I created an "On Error" event handler. It is a script task with the above poster's code that is supposed to turn off the System propogate variable. However, it isn't working. What am I doing wrong?

I need to turn off error handers in the FTP task, so that when I get a file not found error, it doesn't cause the ForLoop container to fail also. It needs to keep looping, even if the file isn't there yet.

Thanks much!

|||

The system variable System:ropagate effects propagation of execution errors. Validation errors will always propagate at least one level up the container hierarchy, probably because the validation error of a task becomes an execution error of the for loop container.

So if an error occurs in the validation phase of the ftp task, the first time a System:ropagate=false error handler could catch it would be in the for each loop. Execution errors, on the other hand, can be caught be an error handler on the ftp task itself.

The two properties which also account for validation errors (which always bubble up at least one level) are ForceExecutionResult and MaximumErrorCount. By setting ForceExecutionResult=Sucess on the for each loop container or by setting MaximumErrorCount on the for each loop container to a large number, the loop will continue.

You can determine in which phase the the error(s) occur by observing if the error events fall exclusively between the OnPrevalidate / OnPostValidate events of the ftp task.