EUI changes everytime when i recompute canvas

I got a problem when i calculate energy use. Here is the problem, everytime when i recompute the canvas, the EUI and indoor temp changes. Just want to know is it correct?! Thanks a lot!!!
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what simulation timestep are you using? and what shading calc method?

Thanks for replying. I have solved this problem with exclusion method. The problem is that i use the same program name for different program, maybe it is conflicted. Appreciate for your help!!