Yes! This is possible - it is a hidden/undocumented SAIL function. Try-catch in Appian SAIL: try ( [CODE], "Code failed" )
EDIT: Thank you, Josh, for that insight! Please exercise care when using this function.
I do not recommend using undocumented functionality. Appian does not guarantee that undocumented functions will continue to work when you upgrade from one version to the next.
How do you get to know about undocumented functions.
You don't and shouldn't go looking for things that are not officially supported as it may suddenly stop working.
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