Hi, I want to create a constraint in my model where I have np particles with a mass m at position x,y as variables. I want to set the constraint that the mass of particles is >0 and I wrote the code below but I get an error

my_model = Model(Ipopt.Optimizer)

set_optimizer_attribute(my_model, “print_level”, 0)

# Define the variables for the m, x and y coordinates of each particle

@variables(my_model, begin

m[1:np]

x[1:np]

y[1:np]

end)

# set mass constraint to be >0

@constraint(my_model,c[i=1:np], m[i]>0)

The error I am getting is the following

LoadError: At /Users/Greg/Documents/OneDrive/Documents/Julia Code/Scalar points optimizer:32: `@constraint(my_model, c[i = 1:np], m[i] > 0)`

: Unrecognized sense >

Any help super appreciated. Cheers, Greg