Can no longer run prediction on SLEAP 1.6.1

[LeahBlankenship]

Bug description

After updating to SLEAP 1.6.1 I can no longer run prediction. I am attempting to run a previously trained model on videos that have already existed in the project prior to updating. My SLEAP is installed in a conda environment.

I get this error:

System diagnostics

Output of sleap doctor

SLEAP System Diagnostics
========================
Generated: 2026-02-14 10:55:51

[Platform]
  OS:        Windows 10
  Platform:  Windows-10-10.0.19045-SP0
  Machine:   AMD64
  Processor: AMD64 Family 26 Model 68 Stepping 0, AuthenticAMD
  RAM:       11.4 GB / 125.7 GB
  Disk:      816.9 GB / 3.1 TB

[Python]
  Version:     3.13.9
  Executable:  C:\Users\SylwestrakGPU\miniforge3\envs\sleap\python.exe
  Prefix:      C:\Users\SylwestrakGPU\miniforge3\envs\sleap

[UV]
  Version:         uv 0.9.5 (d5f39331a 2025-10-21)
  Path:            C:\Users\SylwestrakGPU\.local\bin\uv.EXE
  Cache Dir:       C:\Users\SylwestrakGPU\AppData\Local\uv\cache
  Tool Dir:        C:\Users\SylwestrakGPU\AppData\Roaming\uv\tools
  Tool Bin Dir:    C:\Users\SylwestrakGPU\.local\bin
  Python Dir:      C:\Users\SylwestrakGPU\AppData\Roaming\uv\python

[UV Config]
  Default Python:    (not configured)
  Resolved Python:   C:\Users\SylwestrakGPU\miniforge3\envs\sleap\python.exe
  Python Preference: managed (default)
  Resolution:        highest (default)
  Index Strategy:    first-index (default)
  Prerelease:        if-necessary (default)

[Conda]
  Status:             ACTIVE
  Environment:        sleap
  Prefix:             C:\Users\SylwestrakGPU\miniforge3\envs\sleap

[GPU / CUDA]
  NVIDIA Driver: 581.57 (CUDA 13.0)
  GPU 0:         NVIDIA GeForce RTX 5070 Ti (15386 MB free / 16303 MB)
  PyTorch:       v2.8.0+cu128 (CUDA 12.8)

[Packages]
  sleap:                  v1.6.1 (pip)
  sleap-io:               v0.6.4 (pip)
  sleap-nn:               v0.0.4 (pip)
  numpy:                  v2.2.6 (pip)
  h5py:                   v3.15.1 (pip)
  PySide6:                v6.10.0 (pip)
  opencv-python:          v4.12.0.88 (pip)
  opencv-python-headless: v4.12.0.88 (pip)
  torch:                  v2.8.0+cu128 (pip)
  imageio:                v2.37.2 (pip)
  imageio-ffmpeg:         v0.6.0 (pip)
  av:                     v15.1.0 (pip)

[CLI Binaries]
  sleap:
    Path:      C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Scripts\sleap.EXE
    Real Path: C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Scripts\sleap.exe
    Source:    pip
  sleap-nn:
    Path:      C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Scripts\sleap-nn.EXE
    Real Path: C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Scripts\sleap-nn.exe
    Source:    pip
  sleap-nn-track:
    Path:      C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Scripts\sleap-nn-track.EXE
    Real Path: C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Scripts\sleap-nn-track.exe
    Source:    pip
  sio:
    Path:      C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Scripts\sio.EXE
    Real Path: C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Scripts\sio.exe
    Source:    pip
  ffmpeg:
    Path:      C:\ProgramData\chocolatey\bin\ffmpeg.EXE
    Real Path: C:\ProgramData\chocolatey\bin\ffmpeg.exe
    Source:    PATH
    Python:    v8.0-essentials_build-www.gyan.dev
  ffmpeg (imageio):
    Path:
C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Lib\site-packages\imageio_ffmpeg\binaries\ffmpeg-win-x86_64-v7.1.exe
    Source:    imageio-ffmpeg
    Python:    v7.1-essentials_build-www.gyan.dev

[PATH Conflicts]
  WARNING: Conda paths appear before uv paths in PATH - conda binaries may take precedence

[PATH (relevant entries)]
  C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Lib\site-packages\cv2\../../x64/vc17/bin
  C:\Users\SylwestrakGPU\miniforge3\envs\sleap
  C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Library\bin
  C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Scripts
  C:\Users\SylwestrakGPU\miniforge3\envs\sleap\bin
  C:\Users\SylwestrakGPU\miniforge3\envs\sleap
  C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Library\mingw-w64\bin
  C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Library\usr\bin
  C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Library\bin
  C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Scripts
  C:\Users\SylwestrakGPU\miniforge3\envs\sleap\bin
  C:\Users\SylwestrakGPU\miniforge3\envs\sleap
  C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Library\mingw-w64\bin
  C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Library\usr\bin
  C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Library\bin
  C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Scripts
  C:\Users\SylwestrakGPU\miniforge3\envs\sleap\bin
  C:\Users\SylwestrakGPU\miniforge3\condabin
  C:\Users\SylwestrakGPU\AppData\Local\Programs\Python\Python313\Scripts
  C:\Users\SylwestrakGPU\AppData\Local\Programs\Python\Python313
  C:\Users\SylwestrakGPU\.local\bin
  C:\Users\Sylwestrak GPU\.local\bin

[LeahBlankenship]

I am now seeing the following error when I relaunch anaconda and activate my conda environment. The GUI will still open after this appears, but I'm assuming the issues are likely related?

(base) C:\Users\SylwestrakGPU>conda activate sleap

(sleap) C:\Users\SylwestrakGPU>SET DISTUTILS_USE_SDK=1

(sleap) C:\Users\SylwestrakGPU>SET MSSdk=1

(sleap) C:\Users\SylwestrakGPU>SET "VS_VERSION=16.0"

(sleap) C:\Users\SylwestrakGPU>SET "VS_MAJOR=16"

(sleap) C:\Users\SylwestrakGPU>SET "VS_YEAR=2019"

(sleap) C:\Users\SylwestrakGPU>set "MSYS2_ARG_CONV_EXCL=/AI;/AL;/OUT;/out"

(sleap) C:\Users\SylwestrakGPU>set "MSYS2_ENV_CONV_EXCL=CL"

(sleap) C:\Users\SylwestrakGPU>set "PY_VCRUNTIME_REDIST=\bin\vcruntime140.dll"

(sleap) C:\Users\SylwestrakGPU>set "CXX=cl.exe"

(sleap) C:\Users\SylwestrakGPU>set "CC=cl.exe"

(sleap) C:\Users\SylwestrakGPU>set "VSINSTALLDIR="

(sleap) C:\Users\SylwestrakGPU>set "NEWER_VS_WITH_OLDER_VC=0"

(sleap) C:\Users\SylwestrakGPU>for /F "usebackq tokens=*" %i in (vswhere.exe -nologo -products * -version [16.0,17.0) -property installationPath) do (set "VSINSTALLDIR=%i" )

(sleap) C:\Users\SylwestrakGPU>if not exist "" (for /F "usebackq tokens=*" %i in (vswhere.exe -nologo -products * -requires Microsoft.VisualStudio.ComponentGroup.VC.Tools.142.x86.x64 -property installationPath) do (
set "VSINSTALLDIR=%i"
set "NEWER_VS_WITH_OLDER_VC=1"
) )

(sleap) C:\Users\SylwestrakGPU>if not exist "" (for /F "usebackq tokens=*" %i in (vswhere.exe -nologo -products * -requires Microsoft.VisualStudio.Component.VC.v142.x86.x64 -property installationPath) do (
set "VSINSTALLDIR=%i"
set "NEWER_VS_WITH_OLDER_VC=1"
) )

(sleap) C:\Users\SylwestrakGPU>if not exist "" (set "VSINSTALLDIR=C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional" )

(sleap) C:\Users\SylwestrakGPU>if not exist "C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional" (set "VSINSTALLDIR=C:\Program Files (x86)\Microsoft Visual Studio\2019\Community" )

(sleap) C:\Users\SylwestrakGPU>if not exist "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community" (set "VSINSTALLDIR=C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools" )

(sleap) C:\Users\SylwestrakGPU>if not exist "C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools" (set "VSINSTALLDIR=C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise" )

(sleap) C:\Users\SylwestrakGPU>IF NOT "" == "" (
set "INCLUDE=;"
set "LIB=;"
set "CMAKE_PREFIX_PATH=;"
) else (
set "INCLUDE=C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Library\include;"
set "LIB=C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Library\lib;"
set "CMAKE_PREFIX_PATH=C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Library;"
)

(sleap) C:\Users\SylwestrakGPU>call :GetWin10SdkDir

(sleap) C:\Users\SylwestrakGPU>call :GetWin10SdkDirHelper HKLM\SOFTWARE\Wow6432Node 1>nul 2>&1

(sleap) C:\Users\SylwestrakGPU>if errorlevel 1 call :GetWin10SdkDirHelper HKCU\SOFTWARE\Wow6432Node 1>nul 2>&1

(sleap) C:\Users\SylwestrakGPU>if errorlevel 1 call :GetWin10SdkDirHelper HKLM\SOFTWARE 1>nul 2>&1

(sleap) C:\Users\SylwestrakGPU>if errorlevel 1 call :GetWin10SdkDirHelper HKCU\SOFTWARE 1>nul 2>&1

(sleap) C:\Users\SylwestrakGPU>if errorlevel 1 exit /B 1

(sleap) C:\Users\SylwestrakGPU>exit /B 0

(sleap) C:\Users\SylwestrakGPU>for /F %i in ('dir /ON /B "\include\10.*"') DO (SET WindowsSDKVer=%~i )
The system cannot find the file specified.

(sleap) C:\Users\SylwestrakGPU>if errorlevel 1 (echo "Didn't find any windows 10 SDK. I'm not sure if things will work, but let's try..." ) else (echo Windows SDK version found as: "" )
Windows SDK version found as: ""

(sleap) C:\Users\SylwestrakGPU>set "CMAKE_PLAT=x64"

(sleap) C:\Users\SylwestrakGPU>set "VCVARSBAT=64"

(sleap) C:\Users\SylwestrakGPU>set "CMAKE_ARGS=-DCMAKE_BUILD_TYPE=Release"

(sleap) C:\Users\SylwestrakGPU>IF "" == "1" (set "CMAKE_ARGS=-DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX= -DPython_FIND_REGISTRY=NEVER -DPython3_FIND_REGISTRY=NEVER -DCMAKE_PROGRAM_PATH=\bin;\Scripts;\Library\bin;\bin;\Scripts;\Library\bin" )

(sleap) C:\Users\SylwestrakGPU>IF 2019 GEQ 2019 (
set "CMAKE_GEN=Visual Studio 16 2019"
set "USE_NEW_CMAKE_GEN_SYNTAX=1"
) ELSE (
IF "win-64" == "win-64" (set "CMAKE_GEN=Visual Studio 16 2019 Win64" ) else (set "CMAKE_GEN=Visual Studio 16 2019" )
set "USE_NEW_CMAKE_GEN_SYNTAX=0"
)

(sleap) C:\Users\SylwestrakGPU>echo "NEWER_VS_WITH_OLDER_VC=0"
"NEWER_VS_WITH_OLDER_VC=0"

(sleap) C:\Users\SylwestrakGPU>set /p LATEST_VS= 0<"C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\Microsoft.VCToolsVersion.default.txt"
The system cannot find the path specified.

(sleap) C:\Users\SylwestrakGPU>type "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\Microsoft.VCToolsVersion.default.txt"
The system cannot find the path specified.

(sleap) C:\Users\SylwestrakGPU>dir "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Redist\MSVC"
The system cannot find the path specified.

(sleap) C:\Users\SylwestrakGPU>if "0" == "1" (
echo ""
if "~0,4" == "14.2" (set "CMAKE_GEN=Visual Studio 16 2019" ) else (set "CMAKE_GEN=Visual Studio 17 2022" )
set "USE_NEW_CMAKE_GEN_SYNTAX=1"
)

(sleap) C:\Users\SylwestrakGPU>IF "" == "" SET "CMAKE_GENERATOR=Visual Studio 16 2019"

(sleap) C:\Users\SylwestrakGPU>IF "1" == "1" (
IF "" == "" SET "CMAKE_GENERATOR_PLATFORM=x64"
IF "" == "" SET "CMAKE_GENERATOR_TOOLSET=v142"
)

(sleap) C:\Users\SylwestrakGPU>pushd C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise
The system cannot find the path specified.

(sleap) C:\Users\SylwestrakGPU>if "~0,5" LSS "14.29" (

CALL "VC\Auxiliary\Build\vcvars64.bat" -vcvars_ver=~0,5WindowsSDKVer
) else (CALL "VC\Auxiliary\Build\vcvars64.bat" -vcvars_ver=14.29 )
The system cannot find the drive specified.
The system cannot find the path specified.

(sleap) C:\Users\SylwestrakGPU>if 1 NEQ 0 (if "" == "" (CALL "VC\Auxiliary\Build\vcvars64.bat" ) )
The system cannot find the path specified.

(sleap) C:\Users\SylwestrakGPU>popd

(sleap) C:\Users\SylwestrakGPU>IF NOT "" == "" (set "PATH=;\Library\bin;\Scripts;\bin;;\Library\bin;\Scripts;\bin;C:\Users\SylwestrakGPU\miniforge3\envs\sleap;C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Library\mingw-w64\bin;C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Library\usr\bin;C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Library\bin;C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Scripts;C:\Users\SylwestrakGPU\miniforge3\envs\sleap\bin;C:\Users\SylwestrakGPU\miniforge3\condabin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0;C:\Windows\System32\OpenSSH;C:\Program Files\NVIDIA Corporation\NVIDIA App\NvDLISR;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\ProgramData\chocolatey\bin;C:\Users\SylwestrakGPU\AppData\Local\Programs\Python\Python313\Scripts;C:\Users\SylwestrakGPU\AppData\Local\Programs\Python\Python313;C:\Users\SylwestrakGPU.local\bin;C:\Users\Sylwestrak GPU.local\bin;C:\Users\SylwestrakGPU\AppData\Local\Microsoft\WindowsApps" ) else (set "PATH=C:\Users\SylwestrakGPU\miniforge3\envs\sleap;C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Library\bin;C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Scripts;C:\Users\SylwestrakGPU\miniforge3\envs\sleap\bin;C:\Users\SylwestrakGPU\miniforge3\envs\sleap;C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Library\mingw-w64\bin;C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Library\usr\bin;C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Library\bin;C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Scripts;C:\Users\SylwestrakGPU\miniforge3\envs\sleap\bin;C:\Users\SylwestrakGPU\miniforge3\condabin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0;C:\Windows\System32\OpenSSH;C:\Program Files\NVIDIA Corporation\NVIDIA App\NvDLISR;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\ProgramData\chocolatey\bin;C:\Users\SylwestrakGPU\AppData\Local\Programs\Python\Python313\Scripts;C:\Users\SylwestrakGPU\AppData\Local\Programs\Python\Python313;C:\Users\SylwestrakGPU.local\bin;C:\Users\Sylwestrak GPU.local\bin;C:\Users\SylwestrakGPU\AppData\Local\Microsoft\WindowsApps" )

(sleap) C:\Users\SylwestrakGPU>IF NOT "win-64" == "win-64" (
set "CONDA_BUILD_CROSS_COMPILATION=1"
set "CMAKE_ARGS=-DCMAKE_BUILD_TYPE=Release -DCMAKE_SYSTEM_NAME=Windows -DCMAKE_SYSTEM_PROCESSOR=AMD64"
setlocal enabledelayedexpansion
set CL_DIR1=
set CL_DIR2=
set CL_EXE=
FOR /F "delims=" %i IN ('where cl.exe') DO if not defined CL_EXE set "CL_EXE=%i"
call :GetDirName CL_EXE CL_DIR1
call :GetDirName CL_DIR1 CL_DIR2

subst Z: "!CL_DIR2!"
endlocal
set "CC_FOR_BUILD=Z:/x64/cl.exe"
set "CXX_FOR_BUILD=Z:/x64/cl.exe"
call :ReplaceInTargetVariable "C:\Users\SylwestrakGPU\miniforge3\envs\sleap/Library/lib;C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Library\lib;" LIB_FOR_BUILD
call :ReplaceInTargetVariable "C:\Users\SylwestrakGPU\miniforge3\envs\sleap/Library/include;C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Library\include;" INCLUDE_FOR_BUILD
set "LDFLAGS_FOR_BUILD= /MACHINE:x64"
) else (set "CONDA_BUILD_CROSS_COMPILATION=0" )

(sleap) C:\Users\SylwestrakGPU>call :GetWin10SdkDirHelper HKLM\SOFTWARE\Wow6432Node 1>nul 2>&1

(sleap) C:\Users\SylwestrakGPU>if errorlevel 1 call :GetWin10SdkDirHelper HKCU\SOFTWARE\Wow6432Node 1>nul 2>&1

(sleap) C:\Users\SylwestrakGPU>if errorlevel 1 call :GetWin10SdkDirHelper HKLM\SOFTWARE 1>nul 2>&1

(sleap) C:\Users\SylwestrakGPU>if errorlevel 1 call :GetWin10SdkDirHelper HKCU\SOFTWARE 1>nul 2>&1

(sleap) C:\Users\SylwestrakGPU>if errorlevel 1 exit /B 1

(sleap) C:\Users\SylwestrakGPU>exit /B 0

(sleap) C:\Users\SylwestrakGPU>(IF "_CONDA_SCRIPT" == "_CONDA_SCRIPT" (CALL "C:\Users\SylwestrakGPU\miniforge3\envs\sleap\etc\conda\activate.d~cuda-nvcc_activate.bat" ) ELSE IF "C:\Users\SylwestrakGPU\miniforge3\envs\sleap\etc\conda\activate.d~cuda-nvcc_activate.bat" == "" (SET "_CONDA_SCRIPT=" ) ELSE (SET "_CONDA_SCRIPT=C:\Users\SylwestrakGPU\miniforge3\envs\sleap\etc\conda\activate.d~cuda-nvcc_activate.bat" ) )

(sleap) C:\Users\SylwestrakGPU>if defined INCLUDE (set "INCLUDE_CONDA_NVCC_BACKUP=C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Library\include;" )

(sleap) C:\Users\SylwestrakGPU>set "INCLUDE=C:\Users\SylwestrakGPU\miniforge3\envs\sleap\Library\include;;\targets\x64;\targets\x64\cccl"

(sleap) C:\Users\SylwestrakGPU>if not defined CUDAARCHS (set "CUDAARCHS=75-real;80-real;86-real;89-real;90-real;100-real;103-real;110-real;120-real;121" )

(sleap) C:\Users\SylwestrakGPU>if not defined TORCH_CUDA_ARCH_LIST (set "TORCH_CUDA_ARCH_LIST=7.5;8.0;8.6;8.9;9.0;10.0;10.3;11.0;12.0;12.1+PTX" )

(sleap) C:\Users\SylwestrakGPU>

[LeahBlankenship]

Making a fresh SLEAP install in a fresh conda environment seems to have fixed the issue. So there was likely some error in the update

[gitttt-1234]

Closing this issue, feel free to open a new one if you have any questions!