Error

Catch, throw, and branch on workflow errors.

Error blocks sit in the builder palette under Basic → Error. Catchable failures follow a block’s Error outlet when it is connected; otherwise they bubble to Try On error, or fail the run. On those paths bind error and pipe.error (not pipe.value). Expected failures include bad config, missing values, API failures, invalid Liquid templates, and invalid JSON or Zod input. Fatal errors (EXEC_*, internal, any other thrown Error) skip catch paths. Shared graph rules are on Workflows.

Use	Block
Protect a region	Try
Fail on purpose	Throw error
Split by error code	Branch errors

Try

Run Do, catch on On error, then Always, then continue on Out.

Throw error

Raise a catchable error with a message and optional code.

Branch errors

One outlet per declared error code, plus Other for everything else.