search for: elements_per_request

...please do use it to return control to the user when your code misbehaves. Similarly 'exit' and 'abort' should never be used in R packages. Sometimes it is not under your control: I sometimes see an rgl failure at R: indirect_vertex_array.c:659: emit_DrawArrays_old: Assertion `elements_per_request >= count' failed. that is coming from the Mesa GL libraries. -- Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road,...