Hi everyone I'm trying to estimate both the rho parameter and the degree of freedom of t-ev copula from the data using "fitCopula" function in the "copula" package. However, there is always an error and it says: Error: length(copula at parameters) == length(param) is not TRUE I also tried the same estimation problem for t copula using the same function and it works well. I don't understand why. Has anybody used this function to learn those two parameters at the same time from the data? You help is highly appreciated. Thanks! Hang -- View this message in context: http://r.789695.n4.nabble.com/fit-tevCopula-using-fitCopula-in-the-copula-package-tp4638661.html Sent from the R help mailing list archive at Nabble.com.