[R] multdrc error

Dear Sir/Madam: I am newbie of R. I a currently using multdrc object to generate fitting curve and IC50. My 384 well format raw data contains multi dose response curves. My script goes through sets of data then produce curve and ic50. Here is my sudo code: For (plateid in platelist) { Input d

[R] multdrc error---Error in mdrcOpt(opfct, startVec, optMethod, derFlag, constrained, warnVal

Hi, I am newbie of R. I a currently using multdrc object to generate fitting curve and IC50. My 384 well format raw data contains multi dose response curves. My script goes through set of data then produce curve and ic50. Here is my sudo code: For (plateid in platelist) { Input data (