OpenMx Error Messages

Hi everybody!

It seems that OpenMx does not allow specifying a model without a dataset (see error message (1)). Sure, we will eventually need a dataset to run the model but at design time, I might not have a dataset yet. Only later in the program I might decide to load different datasets and associate them with the same model while at first the dataset reference could be NULL.
Shouldn't OpenMx allow NULL or some kind of empty dataset and test only within run() whether there is a valid dataset available?

Hi,

Some scripts which I'm sure have run without problems a couple of months ago are now giving me the following error:

> equateAEModelFit <- mxRun(equateAEModel)
Running equateAE
Error in slot(model, name) :
no slot of name ".newobjects" for this object of class "MxModel"

Any ideas what's happening?

Thanks,

Paul

I got a rather funny error message from a simulation I was running, and would like to share to prompt a bug fix, discussion and laughter.

Error in checkForRemoteErrors(val):
one node produced an error: The name 'untitled1e+05' is illegal because it contains the '+' character in mxMatrix("Full", values = value, name = localName)

Hi there, I was trying to modify a script I found online, from http://www.vipbg.vcu.edu/~vipbg/OpenMx/, called "InteractionGxE_rGE-hm2.R:. I keep getting the message "Error: A cycle has been detected in model 'rGE' involving the following elements: 'DZ.min2sumll' and 'DZ.objective'". I haven't seen that error before, I'm having trouble finding my error in the syntax. Any pointers for fixing this?

Hello all,
when I want to fit my model, I receive this warning message:
In model 'Similarity Model' NPSOL returned a non-zero status code 6. The model does not satisfy the first-order optimality conditions to the required accuracy, and no improved point for the merit function could be found during the final linesearch (Mx status RED)
and when I then summary my fit, some values are missing.
Below, you can see, my model and also results from summary.
I am a begginer, so I would be really happy, if someone helped me.
Alena

simModel<-mxModel("Similarity Model",
type="RAM",

Hi All,

I am having an issue with the mxConstraint command.
I am getting an error when I try and constrain the sum of the squared real and imaginary eigenvalues to be less than a unit matrix.
The algebra and constraint commands are:

mxAlgebra( expression=(eigenval(ACE.bm)^2) + (ieigenval(ACE.bm)^2), name="eigen"),
mxMatrix( type="Full", nrow=2, ncol=1, free=FALSE, values= 1, name="unit"),
mxConstraint(eigen

Here are the matrices under question:

Real Eigenvalue Matrix
[,1]
[1,] 0
[2,] 0