Answered
When I edit a file on the calculator and saved it, it said saves successfully
but when I look further to open it, it always say
Processing of command: Distance(A, C) or Polygon( ... )
but when I open edit activity in apps version, it is fine, not so when I try to display it to other device.
Anyway to avoid the above error?
The same question 
Please post the link
https://www.geogebra.org/m/zuk6ydqp
Sorry, we've removed some commands from Graphing Calculator so some objects have got lost when it was edited. It will work if you use http://www.geogebra.org/classic to remake it
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