Undocumented activity: Throw

[binaer]

Hi community

I’m having the following situation:
When I’m searching something in an application, I’m able to get “not found”. Now, if it’s not found, I would like to interrupt the workflow and not process any further. For this, I have everything in the Try/Catch (in this case, in the Try-Block). Now, I would like to use “Throw” (best would be a tailored exception) or at least a system exception. I’ve seen and read this members question:

Error when using Throw activity (Throw Faulted)

Hello, I’m using the Throw activity in order to get out of a For each with a specific business rule. My throw activity is set like this: new UiPath.Core.BusinessRuleException(“Error in data”) All my business throw are build like this, but there is one which don’t seems to work as intented, When i Run it and reach it I obtain this error: “Object reference not set to instance of an object” I don’t understand why it seems to work on every throw execpt this one (again, they are identical). Is a…

Now, on a more general note: I cannot find the “throw” activity documentation. What belongs into the field “Exception”? If I try “exception” (same as in the catch-activity), it won’t accept it (it’s declared as “String” and cannot be converted into “Type”). What’s the trick here?

[andrzej.kniola (Andrzej Knioła)]

You need to give there an instance of System.Exception, or anything that inherits from it, f.e.
new UiPath.Core.BusinessRuleException("Required data XYZ not found... bla bla bla...")

[binaer]

@andrzej.kniola

You need to give there an instance of System.Exception, or anything that inherits from it, f.e.
new UiPath.Core.BusinessRuleException(“Required data XYZ not found… bla bla bla…”)

I’m aware about that - and I’ve done it exactly like this… however, it fails

[andrzej.kniola (Andrzej Knioła)]

Throw’s source:
https://referencesource.microsoft.com/#System.Activities/System/Activities/Statements/Throw.cs,52a631d28de0c4ea,references

It’s an MS activity, so you need to look for the documentation elsewhere than UiPath - MSDN is a good source.

@binaer

I’m aware about that - and I’ve done it exactly like this… however, it fails

Works fine for me.
Can you attach your xaml/error message?

[binaer]

Hi

I have a “Throw” activity with the Exception defined:
new UiPath.Core.BusinessRuleException(“bla bla bla”)

and while executing it says “Throw executing” and right after “Throw faulted” where it does cancel the sequence… I do not have a “Create exception” defined before…

[andrzej.kniola (Andrzej Knioła)]

Can’t replicate, sorry
Have you tried other exception types?

[binaer]

Hi

it seems that “throw” is supposed to fail… where the rest is working fine. It is now throwing a businessruleexception and directing into the right “catch”-block.

Thanks for your support