[R] Error in matrix (unlist(value, recursive = FALSE, use.names = FALSE), nrow = nr, : attempt to set an attribute on NULL

marsyxp marsyxp at gmail.com
Tue Oct 9 23:54:15 CEST 2012


I am using Donlp2 package to solve a non-linear problem, but there's an error
I always meet: 

Error in matrix(unlist(value, recursive = FALSE, use.names = FALSE), nrow =
nr,  : 
  attempt to set an attribute on NULL

I have been suffering from this bug for a long time. I'll be very grateful
if somebody could help me -_- 



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