I'm afraid that mendix has a bug which the check-box is read-only.
Is it the issue written as below???
"An input widget connected to an attribute path must be read-only. The Modeler will check this for you."
could you please tell me if someone knows solution about this error.
Apparently, a checkbox is only editable for attributes that belong directly to the entity of your dataview.
If the checkbox refers to an attribute of an associated entity, the checkbox is always non-editable
The 2nd checkbox refers to the associated parent, and is therefore non-editable.
Can be solved by retrievin the associated object in a separate dateview:
Not sure whether that's the case here, but this is what the "An input widget connected to an attribute path must be read-only. The Modeler will check this for you." refers to in the documentation.
Seems strong to me.
I checked in 7.23.4
I suggest to check your data view object