Comments on: R-Sessions 21: Multilevel Model Specification (NLME) http://www.rensenieuwenhuis.nl/r-sessions-21-multilevel-model-specification-nlme/ "The extra-ordinary lies within the curve of normality" Mon, 23 Jan 2012 13:07:36 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Shikta http://www.rensenieuwenhuis.nl/r-sessions-21-multilevel-model-specification-nlme/comment-page-1/#comment-4299 Shikta Thu, 18 Aug 2011 14:49:25 +0000 http://www.rensenieuwenhuis.nl/?p=585#comment-4299 Why do I keep getting this error? **Iteration 1 LME step: Loglik: -1606.834 , nlm iterations: 32 reStruct parameters: ID1 ID2 ID3 ID4 10.055430 2.372683 0.238945 10.159490 Error in nlme.formula((weight) ~ Reed1model(age_months, a, b, c, d), data = wei02yfemale_gr, : Step halving factor reduced below minimum in PNLS step > Why do I keep getting this error?

**Iteration 1
LME step: Loglik: -1606.834 , nlm iterations: 32
reStruct parameters:
ID1 ID2 ID3 ID4
10.055430 2.372683 0.238945 10.159490
Error in nlme.formula((weight) ~ Reed1model(age_months, a, b, c, d), data = wei02yfemale_gr, :
Step halving factor reduced below minimum in PNLS step
>

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