Running HtoA 5.6.3.x in Houdini 17.5


Error running pythonrc.py:
Traceback (most recent call last):
  File "C:/Users/example/htoa/htoa-5.6.3.0_ra766b1f_houdini-17.5.460/scripts/python/pythonrc.py", line 5, in <module>
    import htoa.searchpath
  File "C:/Users/example/htoa/htoa-5.6.3.0_ra766b1f_houdini-17.5.460/scripts/python\htoa\searchpath.py", line 7, in <module>
    import htoa.dialog
  File "C:/Users/example/htoa//htoa-5.6.3.0_ra766b1f_houdini-17.5.460/scripts/python\htoa\dialog.py", line 3, in <module>
    from builtins import str
ImportError: No module named builtins

If you see errors like this, it’s because as of HtoA 5.6.3, the builtins module is required. Houdini 17.5 doesn’t include this module (unlike Houdini 18 and later), so you’ll have to install it.

  • Open a command prompt with Run as Administrator.
  • In the command prompt, run these commands:
cd "C:\Program Files\Side Effects Software\Houdini 17.5.460\python27"
python -m ensurepip --upgrade
python -m pip install future

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