FileNotFoundError: [Errno 2] No such file or directory #206

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1. gsiisg commented on Sep 30, 2026

   

   gsiisg

   on Sep 30, 2026

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   1. Press the Windows Key + R to open the Run dialog box.
   2. Type regedit and press Enter to open the Registry Editor. Click Yes if a user account control prompt appears.
   3. Navigate to the following folder path in the left sidebar:
      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem
   4. Look for a value named LongPathsEnabled in the right pane.
      • If it doesn't exist: Right-click an empty space in the right pane, select New > DWORD (32-bit) Value, and name it LongPathsEnabled.
   5. Double-click LongPathsEnabled.
   6. Change the Value data from 0 to 1.
   7. Click OK and restart your computer for the changes to take effect.
2. Niko1221 commented on Sep 30, 2026

   

   Niko1221

   on Sep 30, 2026

   Owner

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   Thanks. That's Windows' 260-character path limit: the zip holds llama.cpp's web UI with very deep paths. 0.1.28 (in testing) doesn't unpack that part, which Strata doesn't use. Until then, move the folder somewhere short like C:\Strata and run it again.
3. Niko1221

   added a commit that references this issue on Sep 30, 2026

   setup: --host/--api-key/--draft-vocab on a start are kept for the mod…

   ...

   0fc1a1e
4. Niko1221 commented on Sep 30, 2026

   

   Niko1221

   on Sep 30, 2026

   Owner

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   Fixed in 0.1.28: setup no longer unpacks llama.cpp's web UI (the deep paths). Please reopen if setup still stops in a deep folder.
5. Niko1221

   closed this as completedon Sep 30, 2026
6. gputier

   added a commit that references this issue on Sep 30, 2026

   setup: --host/--api-key on a start are kept for the model (Niko1221#179…

   ...

   b9153cd
7. Hugua700

   added a commit that references this issue on Oct 6, 2026

   setup: --host/--api-key/--draft-vocab on a start are kept for the mod…

   ...

   75e6efe
8. anon761

   added a commit that references this issue on Oct 6, 2026

   setup: --host/--api-key/--draft-vocab on a start are kept for the mod…

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9. ElGuyARc commented on Nov 3, 2026

   

   ElGuyARc

   on Nov 3, 2026

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   New evidence for the deep-folder setup problem in this thread: the tools/ui exclusion fixes that member family, but a different member in the same pinned llama.cpp archive still exceeds Windows' ordinary path limit.

   Area / entry point

   [Other] — source setup, get_llama_cpp().

   What happened

   A desktop integration originally reported FileNotFoundError: [Errno 2] while extracting this archive member at an absolute destination length of exactly 260 characters:

   llama.cpp-3cf03257f219afbe7334045ff7c6a06ac68c627d/benches/dgx-spark/aime25_openai__gpt-oss-120b-high_temp1.0_20251109_094547_allresults.json
   

   That original October report came from an older setup copy; its upstream version was not recorded, so I am not labelling it a complete 0.2.10 setup run. I have now reproduced the extraction failure with the actual 0.2.10 get_llama_cpp() function, isolated offline as described below.

   Current reproduction

   • Strata source tag: v0.2.10, commit ffa80d73133ea5c548aefe57889a16e8085a938f.
   • setup.py SHA-256: fc761f5cf6fcc2b70118ae6c484e72c7dd554262ebff59e12a380206a1563c55.
   • Windows x64, version 10.0.26220; Python 3.13.15. GPU and RAM are not involved in this fixture.
   • No model, engine, compiler, network request or registry change is needed.

   The self-contained fixture below reads only that function's AST from an unmodified setup.py. It supplies a tiny local ZIP with the exact member name above and synthetic {} contents, plus the two directory markers the function expects. Its download hook only checks that the local fixture ZIP exists. All extraction, filtering, moves and cleanup otherwise use the real function. No Windows errors are injected.

   Run from a source checkout:

   python -I -B .\reproduce_zip_maxpath.py .\setup.py

   If the process's temporary directory is itself deeply nested, pass --scratch-root naming an existing short writable temporary directory.

   Observed on the same Windows process:

   Extraction destination	Unmodified function	Isolated extended-destination variant
   260 characters	FileNotFoundError, errno 2	Not run
   365 characters	FileNotFoundError, errno 2 / WinError 3	Pass

   The variant changes only the temporary extraction destination to Windows' extended-path form. It still includes the benchmark member and still excludes tools/ui. This is evidence for the path handling direction, not a proposed complete patch or an archive-security review. Machines where ordinary long paths already work may not reproduce the failure.

   Expected / actual

   Expected: setup can unpack its pinned source dependency in a deep writable cache without requiring a machine-wide policy change, or gives an actionable path-length error.

   Actual: setup.py lines 3615–3653 still extracts to an ordinary tmp path and filters only tools/ui; the benchmark member remains eligible and fails before engine preparation finishes. The existing strata_control.longpath helper appears relevant, but I have not changed upstream code.

   Scope and limits

   Reproduced locally: the isolated current source function's extraction failure and the extended-path control. Not run: a full 0.2.10 model download/setup, engine launch, inference or GPU test. The original user's private paths and logs are omitted.

   Would you prefer to reopen this thread for the remaining non-UI archive paths? I searched open and closed issues for the function name, MAX_PATH, the benchmark filename and benches/dgx-spark; I did not find a more specific existing report.

   Offline reproduction: reproduce_zip_maxpath.py

   """Offline source-function fixture. No models, compiler, registry or network.
   
   Usage: python -I -B reproduce_zip_maxpath.py path/to/Strata/setup.py
   Only get_llama_cpp's AST is executed. Its download function is replaced with
   an assertion that the deliberately synthetic ZIP already exists locally.
   """
   import argparse,ast,contextlib,hashlib,json,os,pathlib,platform,shutil,tempfile,time,zipfile
   
   COMMIT='3cf03257f219afbe7334045ff7c6a06ac68c627d'
   BENCH='benches/dgx-spark/aime25_openai__gpt-oss-120b-high_temp1.0_20251109_094547_allresults.json'
   MEMBER='llama.cpp-'+COMMIT+'/'+BENCH
   PAYLOAD=b'{}\n'  # Synthetic text, not the benchmark's real data.
   
   def extended(p):
    text=os.path.abspath(os.fspath(p))
    if os.name!='nt' or text.startswith('\\\\?\\'):return text
    return '\\\\?\\UNC\\'+text[2:] if text.startswith('\\\\') else '\\\\?\\'+text
   
   @contextlib.contextmanager
   def disposable(scratch_root):
    scratch=tempfile.mkdtemp(prefix='strata-zip-',dir=scratch_root)
    try:yield scratch
    finally:
     assert pathlib.Path(scratch).name.startswith('strata-zip-')
     # Cleanup uses native extended paths too; this changes no machine policy.
     shutil.rmtree(extended(scratch))
   
   def fixture(node,target_len,normalize_tmp=False,scratch_root=None):
    with disposable(scratch_root) as scratch:
     # Calculate a destination with the exact measured number of path characters.
     tail=os.path.join('third_party','_unpack',*MEMBER.split('/'))
     padding=target_len-len(scratch)-len(tail)-2
     if padding<1:raise RuntimeError('Temporary root is too long for this boundary fixture')
     home=pathlib.Path(scratch)/('d'*padding);third=home/'third_party';os.makedirs(extended(third))
     archive=third/('llama.cpp-'+COMMIT[:7]+'.zip')
     with zipfile.ZipFile(extended(archive),'w') as z:
      z.writestr(MEMBER,PAYLOAD)
      z.writestr('llama.cpp-'+COMMIT+'/ggml/CMakeLists.txt','synthetic')
      z.writestr('llama.cpp-'+COMMIT+'/gguf-py/','')
      z.writestr('llama.cpp-'+COMMIT+'/tools/ui/excluded.txt','must be excluded')
     destination=home/'third_party'/'_unpack'/pathlib.Path(*MEMBER.split('/'))
     assert len(str(destination))==target_len
     calls={'cachedZipHook':0}
     def download(_url,p,_label):
      calls['cachedZipHook']+=1
      assert p==archive and pathlib.Path(extended(p)).is_file()
     chosen=node
     if normalize_tmp:
      # Proof-of-direction only: change this one destination in the isolated AST,
      # not the reviewed source file, and leave the member filter unchanged.
      import copy
      chosen=copy.deepcopy(node)
      for item in ast.walk(chosen):
       if isinstance(item,ast.Assign) and any(isinstance(t,ast.Name) and t.id=='tmp' for t in item.targets):
        item.value=ast.Call(func=ast.Name(id='_extended_path',ctx=ast.Load()),args=[item.value],keywords=[])
      ast.fix_missing_locations(chosen)
     scope={'home':lambda:home,'LLAMA_CPP_COMMIT':COMMIT,'LLAMA_CPP_ZIP':'https://invalid.example/offline-only','download':download,'shutil':shutil,'zipfile':zipfile,'time':time,'drop_archive':lambda _p:None,'warn':lambda _s:None,'_extended_path':lambda p:pathlib.Path(extended(p))}
     exec(compile(ast.Module(body=[chosen],type_ignores=[]),'<reviewed-get_llama_cpp>','exec'),scope)
     try:
      result=scope['get_llama_cpp']();out=pathlib.Path(extended(result/BENCH))
      assert out.read_bytes()==PAYLOAD
      assert not pathlib.Path(extended(result/'tools/ui/excluded.txt')).exists()
      return {'pathCharacters':target_len,'extendedTmpCandidate':normalize_tmp,'outcome':'passed','calls':calls}
     except OSError as error:
      return {'pathCharacters':target_len,'extendedTmpCandidate':normalize_tmp,'outcome':'failed','exceptionType':type(error).__name__,'errno':error.errno,'winerror':getattr(error,'winerror',None),'calls':calls}
   
   def main():
    parser=argparse.ArgumentParser();parser.add_argument('setup_source');parser.add_argument('--scratch-root',help='Existing short writable temporary directory, if TEMP is redirected to a long path');args=parser.parse_args()
    source=pathlib.Path(args.setup_source).read_bytes();tree=ast.parse(source);node=next(n for n in tree.body if isinstance(n,ast.FunctionDef) and n.name=='get_llama_cpp')
    code=ast.get_source_segment(source.decode('utf8'),node)
    assert '"/tools/ui/" not in m' in code and 'f.extractall(tmp,' in code
    results=[fixture(node,260,scratch_root=args.scratch_root),fixture(node,365,scratch_root=args.scratch_root),fixture(node,365,True,scratch_root=args.scratch_root)]
    assert results[2]['outcome']=='passed'
    report={'schema':1,'sourceSha256':hashlib.sha256(source).hexdigest(),'functionSha256':hashlib.sha256(code.encode()).hexdigest(),'sourceLines':[node.lineno,node.end_lineno],'llamaCommit':COMMIT,'archiveMember':MEMBER,'syntheticMemberContents':True,'python':platform.python_version(),'os':platform.system(),'windowsVersion':platform.version() if os.name=='nt' else None,'cases':results,'publicPathsRedacted':True,'networkOperations':0,'modelsUsed':0,'registryChanges':0,'sourceFilesChanged':0,'limits':['The 260/365-character ordinary cases record this actual Python/Windows environment, not a simulated MAX_PATH refusal. Other environments may already support ordinary long paths.','The extended-destination AST variant proves direction only, not a complete upstream patch or archive-security review.']}
    print(json.dumps(report,indent=2))
   if __name__=='__main__':main()

   Sanitized result

   {
     "schema": 1,
     "sourceSha256": "fc761f5cf6fcc2b70118ae6c484e72c7dd554262ebff59e12a380206a1563c55",
     "functionSha256": "80fcfb9263ed1580f36ac42c00afc8912d80255263cdeb7e2eed79e64672d2ad",
     "sourceLines": [
       3615,
       3653
     ],
     "llamaCommit": "3cf03257f219afbe7334045ff7c6a06ac68c627d",
     "archiveMember": "llama.cpp-3cf03257f219afbe7334045ff7c6a06ac68c627d/benches/dgx-spark/aime25_openai__gpt-oss-120b-high_temp1.0_20251109_094547_allresults.json",
     "syntheticMemberContents": true,
     "python": "3.13.15",
     "os": "Windows",
     "windowsVersion": "10.0.26220",
     "cases": [
       {
         "pathCharacters": 260,
         "extendedTmpCandidate": false,
         "outcome": "failed",
         "exceptionType": "FileNotFoundError",
         "errno": 2,
         "winerror": null,
         "calls": {
           "cachedZipHook": 1
         }
       },
       {
         "pathCharacters": 365,
         "extendedTmpCandidate": false,
         "outcome": "failed",
         "exceptionType": "FileNotFoundError",
         "errno": 2,
         "winerror": 3,
         "calls": {
           "cachedZipHook": 1
         }
       },
       {
         "pathCharacters": 365,
         "extendedTmpCandidate": true,
         "outcome": "passed",
         "calls": {
           "cachedZipHook": 1
         }
       }
     ],
     "publicPathsRedacted": true,
     "networkOperations": 0,
     "modelsUsed": 0,
     "registryChanges": 0,
     "sourceFilesChanged": 0,
     "limits": [
       "The 260/365-character ordinary cases record this actual Python/Windows environment, not a simulated MAX_PATH refusal. Other environments may already support ordinary long paths.",
       "The extended-destination AST variant proves direction only, not a complete upstream patch or archive-security review."
     ]
   }