{"record":{"id":"103f02f425c95bae","repo":"mudler/LocalAI","slug":"error-failed-to-open-crispasr-session-for-model-n","errorCode":null,"errorMessage":"error: failed to open CrispASR session for model\\n","messagePattern":"error: failed to open CrispASR session for model\\\\n","errorType":"console","errorClass":null,"httpStatus":null,"severity":"critical","filePath":"backend/go/crispasr/cpp/crispasr_shim.cpp","lineNumber":161,"sourceCode":"\n  fprintf(stderr, \"[%-5s] \", level_str);\n  fputs(log, stderr);\n  fflush(stderr);\n}\n\nint load_model(const char *const model_path, int threads,\n               const char *backend_name) {\n  whisper_log_set(ggml_log_cb, nullptr);\n  ggml_backend_load_all();\n\n  if (backend_name && *backend_name) {\n    g_session =\n        crispasr_session_open_explicit(model_path, backend_name, threads);\n  } else {\n    g_session = crispasr_session_open(model_path, threads);\n  }\n  if (g_session == nullptr) {\n    fprintf(stderr, \"error: failed to open CrispASR session for model\\n\");\n    return 1;\n  }\n\n  fprintf(stderr, \"info: CrispASR backend selected: %s\\n\",\n          crispasr_session_backend(g_session));\n  return 0;\n}\n\n// set_codec_path forwards a companion file (qwen3-tts codec, orpheus SNAC,\n// chatterbox s3gen, or mimo-asr tokenizer) to the active session. Returns 0 on\n// success or when the active backend needs no companion, negative on failure,\n// and -1 when no session is open.\nint set_codec_path(const char *path) {\n  return g_session ? crispasr_session_set_codec_path(g_session, path) : -1;\n}\n\nint load_model_vad(const char *const model_path) {\n  whisper_log_set(ggml_log_cb, nullptr);","sourceCodeStart":143,"sourceCodeEnd":179,"githubUrl":"https://github.com/mudler/LocalAI/blob/44413a9d06bf5bc52ce088ba8ca74e5a2e8bee26/backend/go/crispasr/cpp/crispasr_shim.cpp#L143-L179","documentation":"The crispasr shim's load_model() failed: neither crispasr_session_open_explicit (with a requested backend name) nor crispasr_session_open could create a session for the given model path. This happens before any transcription and returns 1. The session layer validates the model file and backend availability, so failure means the model is unreadable/unsupported or the chosen backend cannot be instantiated.","triggerScenarios":"load_model(path, threads, backend) with a nonexistent/invalid model file, an unsupported model format for CrispASR, threads <= 0, or a backend_name that is not compiled in / has no compatible device. Leaving backend_name empty still fails if no usable default backend exists.","commonSituations":"Model path from gallery config wrong or file partially downloaded; requesting \"cuda\" on a CPU-only build; incompatible whisper-family model version that CrispASR's session layer rejects; threads misconfigured as 0.","solutions":["Verify the model path exists and is a model format CrispASR accepts; re-download if the file is truncated.","Check that the requested backend name matches one reported available by the build; drop the explicit backend to let crispasr_session_open pick a default.","Pass a sane thread count (> 0).","Read the ggml log lines (routed via ggml_log_cb) above the error — the underlying open failure is logged there."],"exampleFix":"// before\nrc := C.load_model(path, 0, \"cuda\"); // cuda not available, threads=0\n// after\nrc := C.load_model(path, runtime.NumCPU(), \"\") // let the session pick a backend","handlingStrategy":"validation","validationCode":"if threads <= 0 { threads = runtime.NumCPU() }\nif _, err := os.Stat(modelPath); err != nil {\n    return fmt.Errorf(\"crispasr model missing: %w\", err)\n}\nif backend != \"\" && !availableBackends().Contains(backend) {\n    backend = \"\"\n}","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Check load_model's return code before any transcribe call.","Prefer the default backend selection (empty backend_name) unless the device is known.","Keep the model file verified against the gallery hash."],"tags":["crispasr","asr","model-loading","backend-selection"],"backgroundTag":null,"analyzedSha":"44413a9d06bf5bc52ce088ba8ca74e5a2e8bee26","analyzedAt":"2026-08-15T10:13:50.291Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}