Hello everyone,
I try to run SPREGXT to get SDM or SAR SEM but I got this error

db SPREGXT

. spregxt lapi lfdipc lgdppc lecbpc lecffpc, wmfile(G:\major\PhD\DATA\DATAfinal\datapaper2\data for stata\1contiguityweig.dta) model(sdm) nc(57) mf
> x(lin) spar(rho) stand lmspac vce(robust)

================================================== ============================
*** Standardized Weight Matrix (W): (1539x1539) : NC=57 NT=27 (Normalized)
eigenvalues: matrix has missing values
r(504);

. pleas could u give me advice?