The type or types of residual error (currently
"addSd", "propSd", and "lnormSd" are
accepted)
endpoint
the endpoint to apply the error; will default to
the first error in the model
Details
For reserr, the parameter will be named with the dependent
variable from the model as a prefix. For example, if the dependent
variable in the model is Cc, the parameter name for propSd
will become CcpropSd.