Dear all, I have a problem which I have stucked for a while and I didn't find any solution. Would you please take your time and see if you could help me for the following R code. I am using Survival analysis to fit the distribution to my data. My data ranges changes from smaller than 0 to a very big number like (yearly average mileage ). When I add data which are very big in range I receive following error. First I taught by normalizing data it would be solved but it didn't. If anyone has any experience about what would be the reason for error or how I can solve it ? I really appreciate your support and help. f<- Surv(time, status) ~ covariates (there are 56) weibul <- flexsurvreg(f ,dist='weibull' ,data=Data) Error in optim(method = "BFGS", par = c(0.566003631595269, 0, 0, 0, 0, : initial value in 'vmmin' is not finite Med V?nliga H?lsningar Best Regards, Farzaneh Ahmadzadeh, PhD. IE. [[alternative HTML version deleted]]