www.cmm.bristol.ac.uk/forum

To copy the information from the command window:

• Click the "C:\" icon in the top-left of the window
• Choose Edit->Mark
• Drag the selection marker over the text that you want to copy
• Press the "enter" key
• The selected text will now be on the clipboard and you can paste it into a text editor of your choice.

It looks like the cause of your problem is that you have specified an invalid (i.e. non-invertable) level-2 co-variance matrix. This means that when MLwiN attempts to simulate a new response based on this if fails, instead setting the whole co-variance to zero which later on causes the error that you are seeing. The matrix that you are entering is:

0.08
0.25 0.02

If you change this to something valid then I believe that the simulation should run correctly.

thanks Chris,
will change the level 2 matrix. if no more correspondence, it means the code work.
Boliang