[esp-r] erro occured

[武政 孝治]

hello. 

I am simulating it with ESP-r 11.9 by a simple model. There is an error in the numerical result in August.However, the numerical result in January is correct. It doesn't see the reason. Please teach the reason. The model and the result are appended. 

Koji Takemasa (Dr.Eng.)

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