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I sometimes get this error while running an anova.mppm after fitting mppm models, but then I also get the anova table output along with it, which looks fine. I am wondering if it is okay to use the anova results for my analyses even if I get this error.

Sriram Ramamurthy
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  • Please provide a reproducible example. It makes it a lot easier to understand where the error message comes from. – Ege Rubak Apr 17 '22 at 19:59
  • Here is an example which produces the same error: `Str <- hyperframe(str=with(simba, Strauss(mean(nndist(Points))))); fit0 <- mppm(Points ~ id, simba); fit1 <- mppm(Points ~ id, simba, interaction=Str, iformula = ~str + str:group); anova(fit0, fit1, test="Chi")` – Sriram Ramamurthy Apr 17 '22 at 20:18

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Please check that you are using the current releases of the spatstat packages.

This type of error occurred with previous versions of spatstat but was fixed in spatstat.core 2.4-1.

I cannot reproduce this error using the current release of spatstat.core (2.4-2).

In case you still get this error after installing the latest releases, there could be a problem with the R installation. Then I suggest you start R and type library(spatstat); sessionLibs() to see which versions are actually loaded.

Adrian Baddeley
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