Warning message:
In .egarchfit(spec = spec, data = data, out.sample = out.sample,  :
ugarchfit-->warning: solver failer to converge.

下面是我的R代码
> a<-read.table("C:/Users/LXK/Desktop/222.csv",sep=",",header=T)
> y<-ts(a$c)
> x<-diff(y)
> library(rugarch)
> spec = ugarchspec(variance.model = list(model = "eGARCH", garchOrder = c(1, 1)),
+        mean.model = list(armaOrder = c(1, 1), arfima = FALSE), distribution.model = "std")
> fit = ugarchfit(spec = spec, data = x, out.sample = 0, solver = "solnp", solver.control = list(trace = 0))

> fit

*---------------------------------*
*          GARCH Model Fit        *
*---------------------------------*

Conditional Variance Dynamics   
-----------------------------------
GARCH Model     : eGARCH(1,1)
Mean Model      : ARFIMA(1,0,1)
Distribution    : std

Convergence Problem:
Solver Message:

然后没有solver message和convergence problem  
该怎样解决