ruvnet/ruflo · error · Error

Message to write to not found

Error message

Message to write to not found

What it means

During conversation submit, messageToWriteToId (an existing message or a freshly created assistant sibling) was not found in the messages array. The local message tree is out of sync with rootMessageId/data — typically after a branch switch or deleted message — so the streaming response has no target node to write into.

Source

Thrown at ruflo/src/ruvocal/src/routes/conversation/[id]/+page.svelte:214

				}

				messageToWriteToId = addChildren(
					{
						messages,
						rootMessageId: data.rootMessageId,
					},
					{
						from: "assistant",
						content: "",
					},
					newUserMessageId
				);
			}

			const userMessage = messages.find((message) => message.id === messageId);
			const messageToWriteTo = messages.find((message) => message.id === messageToWriteToId);
			if (!messageToWriteTo) {
				throw new Error("Message to write to not found");
			}

			const messageUpdatesAbortController = new AbortController();
			const streamingMode = resolveStreamingMode($settings);

			const messageUpdatesIterator = await fetchMessageUpdates(
				convId,
				{
					base,
					inputs: prompt,
					messageId,
					isRetry,
					files: isRetry ? userMessage?.files : base64Files,
					selectedMcpServerNames: $enabledServers.map((s) => s.name),
					selectedMcpServers: $enabledServers.map((s) => ({
						name: s.name,
						url: s.url,
						headers: s.headers,

View on GitHub (pinned to fa13ee4ad6)

Solutions

1. Verify the referenced identifier exists before use (list available items and match against user input).
2. Return a clear 404-style error listing valid identifiers, and have the caller retry with an existing id.

When it happens

Trigger: Thrown at ruflo/src/ruvocal/src/routes/conversation/[id]/+page.svelte:214 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of ruvnet/ruflo@fa13ee4ad6 (2026-08-18). Data as JSON: /api/errors/a3c94c76adf32da6. Report an issue: GitHub.