请问:空间计量stata运行xsmle和spmat总是出现r(3499)错误是怎么回事呢?
spmat use usaww using usaww.spmat
<istmt>: 3499 SPMAT_read_u() not found
r(3499);
xsmle y x1 x2 x3, wmat(W) model (sdm) robust nolog
<istmt>: 3499 _mata_matrices_xsmle() not found
r(3499);


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