Trying to install Houdini 15.5.462 with HtoA-5.6.0.0 but getting erros

[james.hodgart4KFPA]

Hey! I'm trying to roll back my Houdini a bit in an attempt to get a slightly older plug-in to work, but I'm getting a lot of errors.

Tried a fresh install, removed everything, all Houdini versions and HtoA and the .env file but even then I'm still getting errors like this when dropping down an Arnold node:-

Traceback (most recent call last):

File "Driver/arnold, opdef:/Driver/arnold?OnCreated, node /out/arnold1", line 1, in <module>

File "C:/Users/james/htoa/htoa-5.6.0.0_r370661f_houdini-18.5.462/htoa-5.6.0.0_r370661f_houdini-18.5.462/scripts/python\htoa\searchpath.py", line 23, in <module>

if os.environ.has_key('ARNOLD_PROCEDURAL_PATH'):

AttributeError: '_Environ' object has no attribute 'has_key'

And this in the console:-

SyntaxError: Missing parentheses in call to 'print'. Did you mean print('[htoa] HTOA environment variable already set to %s' % os.environ['HTOA'])?

Been frying my brain all night.

James

[james.hodgart4KFPA]

And when trying to open the licence manager

Traceback (most recent call last):

File "<stdin>", line 1, in <module>

File "C:/Users/james/htoa/htoa-5.6.0.0_r370661f_houdini-18.5.462/htoa-5.6.0.0_r370661f_houdini-18.5.462/scripts/python\htoa\license.py", line 44

print line

^

SyntaxError: Missing parentheses in call to 'print'. Did you mean print(line)?

[Stephen.Blair]

If you want to use a Python 3 version of Houdini (that is what you have), then you have to use HtoA 5.6.3

Older HtoA versions don't support Python 3