Math calculation in object automation fails when the result is one

[Michail Kotantakis]

Hello community,

I have followed the guide provided for the math operations in object automation and i have a strange issue:

I am using the below smart values and the math operator to calculate the remaining quantity in a field called Available.

Field Total with a fixed value that and the attribute type is integer

Used field as integer with the smart value {{object.User.size}} in the automation

Available field as integer with the smart value  {{#=}} {{object.Total}} - {{object.User.size}} {{/}} in the automation

Whenever the result is greater than 2 the rule runs perfect
If the result is 1, meaning i have only one user selected in the User field the automation fails with the following:

Edit Assets field attributes

Error rendering smart-values when executing this rule:

Missing parameter(s) for operator -: 10 -

What is wrong?

Thanks in advance for your help and your time.

[Michail Kotantakis]

I just noticed something since i continued to check this

Any time i add a second or more users in my user's field , the values are populated with the user ids, while if i have a single user, tha value is populated with the user's name.

Is this something that matters or should any parameter be passed in the automation rule