Full_Name: Joerg Maeder Version: R-1.6.1 OS: Solaris Submission from: (NULL) (129.132.77.42) plot.ts crashs when you have a multi-dimensional time series and you try to define the ylab argument. #Test Data: simple 2dimensional time series testdata <- ts(cbind(runif(24),runif(24),freq=4)) #this command works well plot.ts(testdata) #this command don't work plot.ts(testdata,ylab="CRASH")