Google can be your friend here: just search using the text of the error message.   If you Google "The final Hessian matrix is full rank but has at least one negative eigenvalue", you find these links:   http://tinyurl.com/z7s4q4g   http://tinyurl.com/gorokea   Another useful resource is this paper   https://support.sas.com/resources/papers/proceedings15/SAS1919-2015.pdf   Hopefully one of these will suggest a solution for your problem. Good luck!   Edited: Also, if you would provide a description of your study and and your model, someone on the list might be able to help you assess whether you have a correct model. ... View more

c as bound (censored point), c value is third quartile every number iD. can you help me to fix my syntax sas. ... View more