custom_chat_template is not compatible with qwen2.5-instruct series #63

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1. love-cfall commented on Jan 26, 2026

   

   love-cfall

   on Jan 26, 2026

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   Dear,

   Many thanks for sharing rstar series. I was wondering how to adjust custom_chat_template defined at rstar2_agent_trainer.yaml for RL training of qwen2.5-instruct.

   For now, I get (AgentLoopWorker pid=3989193) ERROR:2025-11-06 13:45:39,760:Failed to decode tool call: Expecting ',' delimiter: line 3 column 1 (char 506)

   Hello, I’d like to ask for some clarification.

   I’m training Qwen3-14B-base on 8×H100, and during the early stage of training I encounter a large number of errors like:

   Failed to decode tool call: Expecting property name enclosed in double quotes
   Failed to decode tool call: Expecting ',' delimiter
   Failed to decode tool call: Extra data
   Error when executing tool: 'str' object has no attribute 'get'
   Error when executing tool: 'WolframAlpha'
   Error when executing tool: 'math'

   I’m wondering whether this behavior is normal during the initial phase of training.