<function name="OnTaskFailed" parent="ENTITY" type="hook"> <description>Called when a task this NPC was running has failed for whatever reason. <note>This hook only exists for `ai` type [SENTs](Scripted_Entities).</note> </description> <realm>Server</realm> <added>2023.10.09</added> <args> <arg name="failCode" type="number">The fail code for the task.</arg> <arg name="failCode" type="number">The fail code for the task. It will be a [FAIL_ enum](https://github.com/ValveSoftware/source-sdk-2013/blob/0d8dceea4310fde5706b3ce1c70609d72a38efdf/sp/src/game/server/ai_task.h#L26) or a generated code for a custom string. (second argument)</arg> <arg name="failReason" type="string">If set, a custom reason for the failure.</arg> </args> </function>