Impact model formula not readable in apparun #60

File "C:\\test_ic_model.py", line 20, in <module>
    impact_model = ImpactModel.from_yaml("../ic_model/impact_models/ic_model.yaml")
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MA284853\Documents\python_proj\appabuild\.venv\Lib\site-packages\apparun\impact_model.py", line 176, in from_yaml
    return ImpactModel.from_dict(impact_model)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MA284853\Documents\python_proj\appabuild\.venv\Lib\site-packages\apparun\impact_model.py", line 148, in from_dict
    tree=ImpactTreeNode.from_dict(impact_model["tree"]),
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MA284853\Documents\python_proj\appabuild\.venv\Lib\site-packages\apparun\impact_tree.py", line 138, in from_dict
    node = ImpactTreeNode(
           ^^^^^^^^^^^^^^^
  File "C:\Users\MA284853\Documents\python_proj\appabuild\.venv\Lib\site-packages\pydantic\main.py", line 263, in __init__
    validated_self = self.__pydantic_validator__.validate_python(data, self_instance=self)
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
pydantic_core._pydantic_core.ValidationError: 1 validation error for ImpactTreeNode
models
   [type=invalid_expr, input_value={'EFV3_CLIMATE_CHANGE': '...soc_package_type_TSSOP'}, input_type=dict]

1.0*die_defect_density**2*die_shrink_factor**4*soc_die_area**2*(1.0*manuf_location_CN*(6/soc_die_node**0.3
          + 4) + 1.0*manuf_location_EU*(4.4/soc_die_node**0.3
          + 3.3) + 1.0*manuf_location_FR*(2.2/soc_die_node**0.3
          + 4.4) + 1.0*manuf_location_TW*(6.6/soc_die_node**0.3
          + 43.2809000325))/((1 - exp(-1*die_defect_density*die_shrink_factor**2*soc_die_area))**2*(-4.4*sqrt(2)/(sqrt(soc_die_area)*Abs(die_shrink_factor))
          + 7.7/(die_shrink_factor**2*soc_die_area)))