Out argument value after an exception

[loginerror (Maciej Kuźmicz)]

If I understand @andrzej.kniola explanation from here:

Incorrect Value Passed on Boolean Type as an Input/Output Argument

You’re correct, this is a value type/reference type difference. As was mentioned here (and in the linked thread), when a workflow errors out the arguments are not assigned back. BUT, with reference type (which Array and DataTable are examples of) what gets passed is a memory address (pointer). Changes within the child workflow operate on the same memory space, so it’s not really that they’re passed back, but that the values are changed “underneath” (on the heap). This video (and the Part 2 of…

We can’t initialize the array inside the second workflow because the reference will no longer point ‘outside’ of the workflow (which is the case if you initialize it before entering that second workflow).

At least that’s how I understand it