JSON encode error! Inf and NaN cannot be JSON encoded

[bluetoothbj]

How to set field element when put it as a divide element. My calc element always error:
"
Message
JSON encode error! Inf and NaN cannot be JSON encoded
"
The element is "NAN",
Anyone know what is the matter?

 

[troester]

Which code where?

 

[bluetoothbj]

Solved.Thanks