|
Return code:
1: not converged due to nan inf or other ERR
2: not converge in 100 iteration
4: non-positive-definite information matrix
8: a negative variance component for beta
16: both covariates dropped
32: x1 perfectly predict the outcome (model=2df only)
64: x2 perfectly predict the outcome (model=2df only)
128: collinearity
Return codes can be added up. For example, '9' means the status is '1' and '8'. |
