Error without logs when using with either agent or basic LLM chain

[javdl]

Hi there, thanks for creating this node! I got it installed succesfully, but when I try using it in a workflow I get the following error. It looks like something is wrong in the communication from the agent/llm chain node to the model node?

let me know if you need any other details. I don't know much about n8n internals otherwise I would have submitted a PR.

Node type

n8n-nodes-helicone.lmChatHelicone

Node version

1 (Latest)

n8n version

1.116.2 (Self Hosted)

Time

23-10-2025, 09:12:16

Stack trace

NodeOperationError: Error in sub-node Helicone AI Gateway1 at ExecuteContext.getInputConnectionData (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@file+packages+core_@opentelemetry+api@1.9.0_@opentelemetry+sdk-trace-base@1.30_08b575bec2313d5d8a4cc75358971443/node_modules/n8n-core/src/execution-engine/node-execution-context/utils/get-input-connection-data.ts:352:11) at processTicksAndRejections (node:internal/process/task_queues:105:5) at ExecuteContext.getInputConnectionData (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@file+packages+core_@opentelemetry+api@1.9.0_@opentelemetry+sdk-trace-base@1.30_08b575bec2313d5d8a4cc75358971443/node_modules/n8n-core/src/execution-engine/node-execution-context/execute-context.ts:180:10) at getChatModel (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/@n8n+n8n-nodes-langchain@file+packages+@n8n+nodes-langchain_a24dca14d97268ba43379590ce508ab3/node_modules/@n8n/n8n-nodes-langchain/nodes/chains/ChainLLM/methods/processItem.ts:15:26) at processItem (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/@n8n+n8n-nodes-langchain@file+packages+@n8n+nodes-langchain_a24dca14d97268ba43379590ce508ab3/node_modules/@n8n/n8n-nodes-langchain/nodes/chains/ChainLLM/methods/processItem.ts:35:14) at /usr/local/lib/node_modules/n8n/node_modules/.pnpm/@n8n+n8n-nodes-langchain@file+packages+@n8n+nodes-langchain_a24dca14d97268ba43379590ce508ab3/node_modules/@n8n/n8n-nodes-langchain/nodes/chains/ChainLLM/ChainLlm.node.ts:80:13 at async Promise.allSettled (index 0) at ExecuteContext.execute (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/@n8n+n8n-nodes-langchain@file+packages+@n8n+nodes-langchain_a24dca14d97268ba43379590ce508ab3/node_modules/@n8n/n8n-nodes-langchain/nodes/chains/ChainLLM/ChainLlm.node.ts:83:26) at WorkflowExecute.executeNode (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@file+packages+core_@opentelemetry+api@1.9.0_@opentelemetry+sdk-trace-base@1.30_08b575bec2313d5d8a4cc75358971443/node_modules/n8n-core/src/execution-engine/workflow-execute.ts:1093:8) at WorkflowExecute.runNode (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@file+packages+core_@opentelemetry+api@1.9.0_@opentelemetry+sdk-trace-base@1.30_08b575bec2313d5d8a4cc75358971443/node_modules/n8n-core/src/execution-engine/workflow-execute.ts:1274:11) at /usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@file+packages+core_@opentelemetry+api@1.9.0_@opentelemetry+sdk-trace-base@1.30_08b575bec2313d5d8a4cc75358971443/node_modules/n8n-core/src/execution-engine/workflow-execute.ts:1699:27 at /usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@file+packages+core_@opentelemetry+api@1.9.0_@opentelemetry+sdk-trace-base@1.30_08b575bec2313d5d8a4cc75358971443/node_modules/n8n-core/src/execution-engine/workflow-execute.ts:2315:11```