Hi,

Why is the mxConstraint command not working anymore?

How else is one to constrain the variances to unity?

Thanks.

Fruhling

# Algebra to compute total variances and standard deviations (diagonal only)

```
mxAlgebra( expression=A+C+E, name="V" ),
mxMatrix( type="Iden", nrow=nv, ncol=nv, name="I"),
mxAlgebra( expression=solve(sqrt(I*V)), name="sd"),
```

# Constraint on variance of ordinal variables

```
mxConstraint( alg1="V", "=", alg2="I", name="Var1"),
```

Error in mxConstraint(alg1 = "V", "=", alg2 = "I", name = "Var1") :

unused argument(s) (alg1 = "V", alg2 = "I")