Anyone else experiencing the following error using Qwen3.5 35B A3B?

Tool 'str_replace' not found. Available: ['terminal', 'file_editor', 'task_tracker', 'browser_navigate', 'browser_click', 'browser_get_state', 'browser_get_content', 'browser_type', 'browser_scroll', 'browser_go_back', 'browser_list_tabs', 'browser_switch_tab', 'browser_close_tab', 'browser_get_storage', 'browser_set_storage', 'default_create_pr', 'default_create_mr', 'default_create_bitbucket_pr', 'default_create_azure_devops_pr', 'tavily_tavily_search', 'tavily_tavily_extract', 'tavily_tavily_crawl', 'tavily_tavily_map', 'tavily_tavily_research', 'finish', 'think']

I'm running Q4_K_L from unsloth, with F16 KV-Cache (non-quantized), and thinking disabled (although I did get this error at the same frequency with thinking enabled) This happens regardless of context size, and can occur even at the very beginning of a conversation. Is OpenHands missing a tool? Or is the Qwen3.5 models specifically expecting it to exist for some weird reason?

I see a similar behavior running w/ Qwen 3 Coder Next 80B FP8. As I understand it,

str_replace

is not tool, but rather a command for the

file_editor

tool. After a mistake like this, OpenHands will usually get it to recover on a the second or third try. does it succeed eventually if you let it go?

Yeah it succeeds on the second try 👍 Do you happen to use the GUI or the CLI?

I use the CLI, but have lately learned that they both share the same backend SDK.. so behaviors like this should (I think) be common between them both

Do you use event-based condensing or token-based condensing? It seems the GUI only let's me define a threshold for context condensing based on "events". This means sometimes my llm breaks because it stops due to context overflow. I've heard the CLI supports token-based condensing. Do you use that?

this is an area where I have been uncertain as well. I think I am using token-based condensing in my current config.. %60 confidence 😆 https://openhands-ai.slack.com/archives/C06U8UTKSAD/p1773251207524289?thread_ts=1773250124.099989&cid=C06U8UTKSAD

Yeah, like that guy I can't see any agent_settings.json file anywhere. I'll continue the thread there instead 🙂 Thank you!