When I-pt is run, it may begin to open up a window then immediately exit. If the IPT64.bat file is run from a command prompt, additional error information will be displayed. If there is an error related to importing the _imagingtk module, this means that your installation of Python may have a broken PIL or Pillow module. Several versions of Anaconda Python are known to come with such a broken package.
To fix this broken package, one must open an Anaconda command prompt and update the Pillow package:
conda update pillow
or in a normal command prompt if Anaconda is not being used:
pip install pillow --upgrade
I-pt should then run successfully. If neither option works, a known workaround for Anaconda 2.3.0 Python 2.7 is to download the attached files and then open an Anaconda/cmd command prompt and enter the following commands:
python -m pip install --upgrade pip-19.3.1-py2.py3-none-any.whl --no-deps pip install Pillow-6.2.1-cp27-cp27m-win_amd64.whl --no-deps
It is highly suggested to attempt the conda/pip update/upgrade options first, however, as this last option has the potential to install incompatible packages.