If you are using a calculating attribute you should not create a new project estimation object.
Instead it would be better to create a decimal variable and add ProjectEstimation/ExecutiveHour + ProjectEstimation/PMhour + ProjectEstimation/BAhour. This variable should be returned at the end of the microflow.
Thank you Maatern! I realized I made a mistake for creating an object instead of a new variable. I add the hour when I create a new variable and return it as the same data type at the end of microflow. But I still get one error.
Do you know what caused it? Thank you.