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Thanks a lot to everybody that helped me out with this. Conclusions: (1) In order to edit arima in R: >fix(arima) or alternatively: >arima<-edit(arima) (2) This is not contained in the "Introduction to R" manual. (3) A "productive" fix of arima is attached (arma coefficients printed out and error catched so that it doesn't halt parent loops to search for

Dear R users, I am trying to simulate some multitrait-multimethod models using the packages sem and psych but whatever I do to deal with models which do not converge I always get stuck and get error messages such as these: "Error in summary.sem(M1) : coefficient covariances cannot be computed" "Error in solve.default(res$hessian) : System ist f?r den Rechner singul?r: reziproke

...#39;ve understood properly), and also passing in variables with enough space (I know how much it will be). Neither change gets rid of the segmentation fault. In case it helps, here's one of the 2 callocs (the other is identical, with a different name): trunccdfs = (double *) calloc(*nbins * *nconds, sizeof(double)); Before jumping in with a debugger (and running R with debugging for the first time) I thought I'd see whether this rang any bells with anyone. Again, the part that confuses me (but that may be the clue as to what's wrong) is that this code worked fine with R-1.1.1. If mo...

in ?arima (R-1.9.1), the return value component 'convergence' should be 'code'? (it's a pity there is no reliable way to check return value documentation consistency with the code, or is there?) h. ---------------------------------- Hiroyuki Kawakatsu School of Management and Economics 25 University Square Queen's University, Belfast Belfast BT7 1NN Northern Ireland

in ?arima (R-1.9.1), the return value component 'convergence' should be 'code'? (it's a pity there is no reliable way to check return value documentation consistency with the code, or is there?) h. ---------------------------------- Hiroyuki Kawakatsu School of Management and Economics 25 University Square Queen's University, Belfast Belfast BT7 1NN Northern Ireland