René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"FeOs: Defining parameters including kij for general fitting of cubic EoS","articleBody":"Hello,\r\n\r\nI would like to fit other cubic EoS to experimental data using FeOs. For this I have used as a starting point [core_user_define_eos.ipynb ](https://github.com/feos-org/feos/blob/main/docs/tutorials/eos/python/core_user_defined_eos.ipynb) and binary_parameter_optimization.ipynb. This works fine for PC-SAFT, but reading multiple *.json files including binary parameters for a general EoS is causing an error which I do not understand. Do you have any insights?  I am working with the Peng-Robinson example to start. Please refer to the attachment and the following section of code.\r\n\r\n**Code**\r\n---------------------------------------------------------------------------\r\nparameters = PengRobinsonParameters.from_multiple_json(\r\n    [\r\n        (['argon'], file_pure),\r\n        (['ammonia'], file_pure)\r\n    ],\r\n    binary_path=file_binary,\r\n)\r\nparameters\r\n\r\n**Code-generated Error**\r\n---------------------------------------------------------------------------\r\nRuntimeError                              Traceback (most recent call last)\r\n~\\AppData\\Local\\Temp\\ipykernel_3844\\3446048090.py in \u003cmodule\u003e\r\n----\u003e 1 parameters = PengRobinsonParameters.from_multiple_json(\r\n      2     [\r\n      3         (['argon'], file_pure),\r\n      4         (['ammonia'], file_pure)\r\n      5     ],\r\n\r\nRuntimeError: invalid type: map, expected f64 at line 19 column 25\r\n\r\n\r\n\r\n[T=374K.zip](https://github.com/feos-org/feos/files/10235487/T.374K.zip)\r\n\r\n\r\n","author":{"url":"https://github.com/ErichMace","@type":"Person","name":"ErichMace"},"datePublished":"2022-12-15T09:02:41.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/91/feos/issues/91"}