form control error:ERROR Error: No value accessor for form control with unspecified name attribute

Question

In the below component when the component is loaded in the angular4 app I keep getting the error:

ng:///HeaderModule/HeaderComponent.ngfactory.js:334

Answer 1

in ionic 4 i had this error in my code:

 {{num_temp[i]}}

i changed code to: (ngModel is Unnecessary in my code)

 {{num_temp[i]}}

and now error not shown :)