>>>>UPDATE. I'm thinking that we should not use both type="number" and our own directive at the same time as the directive seems to be doing what type="number" should be doing. I'll try removing type="number" and using type="text" and see if it fixes the problem.
>>>>
>>>>UPDATE 2. By changing input type="text" from input type="number" I got rid of the error. The only problem is that this is used in many places in our application, so we would need to change all of them.
>>>
>>>If I remove the input type="number" and change it to type = "text" then the min/max attributes are ignored. Is there a way to fix our directive to still generate the errors for min /max but keep type text as type number causing this error in angularjs 1.13.3 ?
>>>
>>>I also posted it as an issue on the angularjs site.
>>>
>>>UPDATE 3. I am thinking that we need to apply our formatting directive after the input type="number" directive is applied. According to this blog post
>>>
>>>https://coderwall.com/p/hpewqw/remember-angularjs-directives-can-have-priorities we may try using negative priority. So, this is going to be my new test - may be it will resolve the issue.
>>>
>>>UPDATE 4. So I've tried using
>>>

>>>app.directive('smNumberFormat', ['$filter', function ($filter) {
>>>        return {
>>>            restrict: 'A', // only activate on element attribute
>>>            require: '?ngModel', // get a hold of NgModelController   
>>>            priority: - 3, // apply this directive after the input type="number" is applied
>>>            link: function (scope, element, attrs, ngModel) {
>>>

>>>
>>>but unfortunately it didn't help with the problem and I still got the same error. Do you see a workaround for me?
>>>
>>>Thanks in advance.
>>
>>Can you post the code for your smNumber directive ?
>
>I don't think smNumber is the problem one, if I include it and input type="number", I don't get any problem. In any case, here it is:
>
>

>//source: http://docs.angularjs.org/guide/forms
>(function () {
>    'use strict';
>    var ctrl = false;
>    var app = angular.module('sysMgrApp');
>
>    app.directive('smNumber', function () {
>        return {
>            link: function (scope, element, attrs, ngModel) {
>                element.on('keydown', function (event) {
>
>                    //Set the default decimal places to 0, if accuracy is not specified
>                    var accuracy = parseInt(attrs.accuracy) || 0;
>                    if (isCombo(event)) {
>                        return true;
>                    }
>
>                    if (isNumericKeyCode(event.keyCode) ||
>                        isNavigationKeycode(event.keyCode)) {
>                            return true;
>                        }
>                    
>                    if (accuracy > 0) {
>                        return isDecimal(event.keyCode);
>                    }
>
>                    return false;
>                });
>            }
>        };
>
>    });
>
>    function isNumericKeyCode(keyCode) {
>        return (keyCode >= 48 && keyCode <= 57)
>            || (keyCode >= 96 && keyCode <= 105);
>    }
>
>    function isDecimal(keyCode) {
>        return (keyCode === 190 || keyCode === 110);
>    }
>
>    //function isComma(keyCode) {
>    //    return (keyCode === 188);
>    //}
>
>    function isCombo(event) {
>        // c, v, x 
>        if (event.ctrlKey && (event.keyCode === 67 || event.keyCode === 86 || event.keyCode === 88)) { return true; }
>    }
>    function isNavigationKeycode(keyCode) {
>        switch (keyCode) {
>            case 8: //backspace
>            case 35: //end
>            case 36: //home
>            case 37: //left
>            case 38: //up
>            case 39: //right
>            case 40: //down
>            case 45: //ins
>            case 46: //del
>            case 109: //subtract
>            case 189: //dash
>            case 9: //tab
>                return true;
>            default:
>                return false;
>        }
>    }
>})();

>

Think you're right. One thing to check : Is currentSpecial.discFlat in your model a number. If it's a string I think it could cause the error - see:
https://docs.angularjs.org/api/ng/input/input%5Bnumber%5D

>What is your angularjs version?

Current project is 1.3.4 - but not relevany since I haven't tried your code :-}