import traceback error Unable to support the target environment .net core

[me514336779]

ironpython 2.7.*

import traceback

v4.7.2
is ok

but

net9;net6
error message
ScriptException:Traceback (most recent call last):
File "IronPython\PY\t2.py", line 1, in
File "C:\Program Files\IronPython 2.7\Lib\traceback.py", line 3, in
File "C:\Program Files\IronPython 2.7\Lib\linecache.py", line 9, in
File "C:\Program Files\IronPython 2.7\Lib\os.py", line 63, in
File "C:\Program Files\IronPython 2.7\Lib\ntpath.py", line 12, in
File "C:\Program Files\IronPython 2.7\Lib\warnings.py", line 303, in
ValueError: Type doesn't have a method with a given name and signature. (Parameter 'type')