GAUSS ™ Technical Support FAQs

General Questions

Q. Does a change in the date that Daylight Savings Time goes into effect matter to GAUSS functions?

Q. I am getting a file not found error when I try running an example that comes with GAUSS.

Q. What are the minimum machine requirements for GAUSS?

Q. How do I use FORTRAN with the GAUSS Foreign Language Interface?

Q. Changing the workspace size in my gauss.cfg file has no effect. Why?

Q. How can I initialize and store data into arrays?

Q. I get an error "0498 Environment variable referenced but not defined : 'read_config_file() in GAUSS_CreateWorkspace()'," what is wrong?

Q. What are the differences between GAUSS and Matlab*?

Common License Error Messages

Q:I get a 'License expired or other license manager error' message when I try to run GAUSS, what's going on?

Q: I have to type in the license path on the first screen every time I run GAUSS, how can I fix this?

Network Installation

Q. My floating network license runs on the server, but not on the client machines. Why?

GAUSS Engine

Q. My Constrained Optimization, Constrained Maximum Likelihood, CurveFit, FANPAC, FANPACMT and Maximum Likelihood problems that require keyboard input run fine under GAUSS but hang when run using the GAUSS Engine. Why?

Q. How do I call the GAUSS Engine from VB?

Windows*

Q. Does GAUSS run under Vista?

Q. My problem has large matrices, how large can they be?

Q. After installing Windows XP service pack 2 on my FLEXLM License Server, I find that the client machines now cannot connect unless I disable the firewall. How can I fix this?

Q. Can I run GAUSS in batch mode?

Q. I get the following error message when reinstalling my GAUSS. "The installed version of the application could not be determined. The setup will now terminate." What should I do?

Q. I have large programs that take a long time to run, and sometimes they run out of memory unexpectedly. What can I do?

Q. I have a version of Windows in which the GAUSS prompt does not appear correctly. How do I fix it?

Application Modules

Q. What does the suffix MT mean that we see in many procedures and in the newer applications?

Q. How different is CMLMT from CML?

Q. I have just installed a updated version of an application that has always worked in the past, but now I am getting syntax errors in the updated library files. What do I do?

Q. The covariance matrix returned from Maxlik (or CML or CMLMT) is a missing value, or I'm getting the error message, "Hessian calculation failed", or the standard errors are not being printed with the estimates.

Q. How accurate are CML and Maxlik estimates, and will AD improve their accuracy?

Q. What optimization programs are available in GAUSS?

Q. My log-likelihood is complex. What do I do?

Q. I just got MAXLIK 5.0. When I run it, I get a message that scalInfNanMiss is undefined. What's wrong?

Q. What is the difference between Maximum Likelihood and Optimization or Constrained Maximum Likelihood and Constrained Optimization?

Q. What is the difference between Constrained Maximum Likelihood and Maximum Likelihood or Constrained Optimization and Optimization?

Q. What is the difference between Nonlinear Equations and Maximum Likelihood?

Q. What is the difference between Optimization/Constrained Optimization and Nonlinear Equations?

Q. The application modules OPTMUM and MAXLIK seem to share a lot of features. Can someone explain the differences in functionality between the two modules?

Third Party Application Modules

Q. Do I need to have GAUSS in order to use Gaussx?

Q. Does LikPak require that any other applications be installed in order to run?