[json.exception.type_error.302] type must be number, but is null when converting json to larger verctor

[calvinwiii-flpds]

the purpose of this code is to send a structure containing a vector as json to a cloud site where one may edit, insert or delete vector elements. the code works fine for edit or delete, but when a vector entry is inserted, the json to structure conversion fails when converting data into the vector with error [json.exception.type_error.302] type must be number, but is null

the really odd part, vector is allocated to be 15 elements, but by default we are only using 10. insert fails if the number of elements is larger than the original upload even though the code is creating new structures each time..

this error occurs in linux code that was built with gcc. I did not test with windows code

struct CONFIGURATION_DATA
{
std::vector Recipe; // { std::vector(MAX_RECIPES, { "","",0,0,"",0,"",0,"" }) }; // [MAX_RECIPES] ; //programable recipe sequence

};

struct CONFIGURATION
{
std::string stationId;
std::string type;
std::string timeStamp;
std::string uniqueId;
//struct SETTINGS settings;
//std::string Config_Name;
//std::vector Recipe{ std::vector(MAX_RECIPES,{"","",0,0,"",0,"",0,""}) }; // [MAX_RECIPES] ; //programable recipe sequence
CONFIGURATION_DATA configuration_data;
};

void to_json(json& j, const CONFIGURATION_DATA& A)
{
j = json{ { CONFIGURATION_DATA_RECIPE_TAG, A.Recipe}
};
}

void from_json(const json& j, CONFIGURATION_DATA& A)
{
A.Recipe.resize(MAX_RECIPES);
std::cout << "CONFIGURATION_DATA_RECIPE_TAG" << std::endl;
j.at(CONFIGURATION_DATA_RECIPE_TAG).get_to(A.Recipe); <<< code fails here if vector size is increased
std::cout << "CONFIGURATION_DATA_RECIPE_TAG exit" << std::endl;
}

void to_json(json& j, const CONFIGURATION& A)
{
j = json{ {CONFIGURATION_STATION_TAG,A.stationId},
{ CONFIGURATION_TYPE_TAG,A.type},
// { CONFIGURATION_TIMESTAMP_TAG,A.timeStamp },
// { CONFIGURATION_UNIQUE_ID_TAG,A.uniqueId},
{ CONFIGURATION_DATA_TAG,A.configuration_data}
};
}

void from_json(const json& j, CONFIGURATION& A)
{
//j.at(CONFIGURATION_STATION_TAG).get_to(A.stationId);
//j.at(CONFIGURATION_TYPE_TAG).get_to(A.type);
//j.at(CONFIGURATION_DATA_TAG).get_to(A.settings);
//j.at(CONFIGURATION_CONFIG_NAME_TAG).get_to(A.Config_Name);
//j.at(CONFIGURATION_DATA_TAG).get_to(A.Recipe);
std::cout << "CONFIGURATION_TIMESTAMP_TAG" << std::endl;
j.at(CONFIGURATION_TIMESTAMP_TAG).get_to(A.timeStamp);
std::cout << "CONFIGURATION_UNIQUE_ID_TAG" << std::endl;
j.at(CONFIGURATION_UNIQUE_ID_TAG).get_to(A.uniqueId);
std::cout << "CONFIGURATION_DATA_TAG" << std::endl;
j.at(CONFIGURATION_DATA_TAG).get_to(A.configuration_data);
std::cout << "CONFIGURATION_DATA_TAG exit" << std::endl;

}

bool ConfigurationFromJson(std::string* pmessage, SETTINGS* psettings, std::string* uniqueID_return)
{
int i;
CONFIGURATION configuration;

json Doc = json::parse(pmessage->c_str());

try {
	Doc.get_to(configuration);
}

catch (const std::exception& e)
{
	std::cout << e.what();
	return false;
}

for (i = 0; i < MAX_RECIPES; i++)
{
	psettings->Recipe[i] = BlankRecipe();
}
for (i = 0; i < (int)configuration.configuration_data.Recipe.size();i++)
{
	std::cout << "adding recipe " << configuration.configuration_data.Recipe[i].tag << std::endl;
	psettings->Recipe[i] = configuration.configuration_data.Recipe[i];
}

*uniqueID_return = configuration.uniqueId.c_str();
return true;

}

[calvinwiii-flpds]

never mind ... I finally found the answer, the web developer had failed to initialize one variable so there actually was a null data entry that should have been an empty string