NoSuchKeyThe specified key does not exist.iray/api_reference/examples/html/classmi_1_1ISpectrum.htmlFX8G5BARKY8RXDR73zYRXV02Rf4OpMSbJ26d5jjIFi3RBjpUOJQL3KsRzV397gYIkjEEbqvWp6XTxUlOy5ceP4DY7Ps=