>>>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?
>>
>>discFlat originally comes as a number. However, if you look closer at the smNumberFormat directive you'll see that we're using $filter service and it returns a string.
>
>Hmm. Could be wrong but it seems to me that if you are using 'type="number"' then angular won't allow commas anyway so that filter is redundant ?
>
May be you're right, but there is also the accuracy. So, if we set it to 2, the number will show with 2 decimals only.

Also, that code used to work just fine before the upgrade to the latest angularjs, e.g. the number will show with commas formatted correctly.