Prompt groups must be re-asserted every frame via PromptSetActiveGroupThisFrame or the group vanishes

Context

Registering prompts (begin→…→end) is not enough to display them. A prompt group only renders on frames where you actively assert it.

The fix

In a per-frame loop:

PromptSetActiveGroupThisFrame(
  groupId,
  CreateVarString(10, "LITERAL_STRING", title),  -- title MUST be VarString-wrapped
  pageCount,
  0
)

• The native is _UI_PROMPT_SET_ACTIVE_GROUP_THIS_FRAME (0xC65A45D4453C2627).
• The group id is typically a random int (GetRandomIntInRange(0, 0xffffff)).
• Stop calling it and the whole group disappears — "ThisFrame" is literal.

The trap

The title argument is a VAR_STRING, not a raw Lua string (the doc's param name name is misleading). Passing a plain string renders blank.

Verified

prompt/client.lua:20-24 (the per-frame group draw) and :238. The native exists in docs but the per-frame-loop requirement and the VarString title are not noted.

Linked natives

• _UI_PROMPT_SET_ACTIVE_GROUP_THIS_FRAME (0xC65A45D4453C2627)

Tags: prompt, hud, per-frame, thisframe, varstring, group
Category: natives
Source: jo_libs-fleet
Created: 2026-05-31T09:39:55.965Z