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Dear,
I am running a three-level binary model, but I get "overflow allocating smatrix". Please how should I correct it?
Here is my snthax:

runmlwin helse_trening cons , ///
level3(Fylke: cons) ///
level2(Kommune: cons) ///
level1(N:) ///
discrete(distribution(binomial) link(logit) denom(cons) pql2) ///
nopause mlwinpath(C:\Program Files (x86)\MLwiN v2.36\x64\mlwin.exe)

Best regards,
Dawit

This error message indicates that the required matrix size was too large to be allocated. You may be able to fix this by specifying the optimat option in your call to -runmlwin-. If this doesn't fix it then you may need to check your data to see whether you have any particularly large higher-level units and then reduce their size.

thank you... it works prefect !!