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Dear Tom, fellow RSiena users,
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<div>A small RSiena problem to resolve between World Cup matches: I may have stumbled upon a bug/version conflict/problem of sorts with RSiena. I'm estimating model with two sets of one-mode networks.
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<div>The model can be estimated fine with R 2.15.3 and RSiena RSiena_1.1-212 on my Mac running Mavericks, including using the parallel package. I've built RSiena_1.1-212 from source when downgrading to identify the potential problem, but it definitely worked
back in April last year with the binary as well.</div>
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<div>In the meantime I've upgraded to R 3.1.0 and RSiena 1.1-232. Alas, the identical model now estimates fine until Phase 3 Iteration 1, then stops with the following warnings (any number from 16 to 25 warnings are generated):</div>
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<div>Warning messages:</div>
<div>1: In cor(z$sf[, i], scores[, i]) : the standard deviation is zero</div>
<div>2: In cor(z$sf[, i], scores[, i]) : the standard deviation is zero</div>
<div>3: In cor(z$sf[, i], scores[, i]) : the standard deviation is zero</div>
<div>4: In cor(z$sf[, i], scores[, i]) : the standard deviation is zero</div>
<div>5: In cor(z$sf[, i], scores[, i]) : the standard deviation is zero</div>
<div>6: In cor(z$sf[, i], scores[, i]) : the standard deviation is zero</div>
<div>7: In cor(z$sf[, i], scores[, i]) : the standard deviation is zero</div>
<div>8: In cor(z$sf[, i], scores[, i]) : the standard deviation is zero</div>
<div>9: In cor(z$sf[, i], scores[, i]) : the standard deviation is zero</div>
<div>10: In cor(z$sf[, i], scores[, i]) : the standard deviation is zero</div>
<div>11: In cor(z$sf[, i], scores[, i]) : the standard deviation is zero</div>
<div>12: In cor(z$sf[, i], scores[, i]) : the standard deviation is zero</div>
<div>13: In cor(z$sf[, i], scores[, i]) : the standard deviation is zero</div>
<div>14: In cor(z$sf[, i], scores[, i]) : the standard deviation is zero</div>
<div>15: In cor(z$sf[, i], scores[, i]) : the standard deviation is zero</div>
<div>16: In cor(z$sf[, i], scores[, i]) : the standard deviation is zero</div>
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<div>etc.</div>
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<div>Updating RSiena to 1.1.276 changes nothing, i.e. I still get the warnings. I also get this when estimating the model without any covariates and three network effects.</div>
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<div>First, I wonder if this should lead me to question the results obtained with Siena 1.1-212. If not, I'd be fine just using the old version. The only advantage of course would be that with 1.1-276 I could use sienaRI, which looks extremely promising. Second,
what do these warning tell me? The .out file looks fine to me.</div>
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<div>—Mark</div>
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