Hello everybody. I am using optim() to minimize a function of 19 variables and I repeatably get the following error message: R> source("/users/sat/rksh/goldstein/emulator/optimizer.R") sann objective function values initial value 5044.955275 Error in La.svd(x, nu, nv, method) : error code 1 from Lapack routine dgesdd R> This error occurs whether I use SANN or Nelder-Mead. My objective function doesn't seem to do anything odd near my starting value. Does anyone have any experience of this error message? -- Robin Hankin Uncertainty Analyst Southampton Oceanography Centre SO14 3ZH tel +44(0)23-8059-7743 initialDOTsurname at soc.soton.ac.uk (edit in obvious way; spam precaution)