method enet periodically fails

[tobigithub]

train(x,y,"enet") :
Error in { : task 1 failed - "arguments imply differing number of rows: 3, 2"

> train(x,y,"enet")
Elasticnet 

10 samples
20 predictors

No pre-processing
Resampling: Bootstrapped (25 reps) 
Summary of sample sizes: 10, 10, 10, 10, 10, 10, ... 
Resampling results across tuning parameters:

  lambda  fraction  RMSE      Rsquared   RMSE SD    Rsquared SD
  0e+00   0.050     11.32400  0.5323731   2.905445  0.3342669  
  0e+00   0.525     14.07560  0.4908514   9.498497  0.3949161  
  0e+00   1.000     18.24437  0.4932672  17.952378  0.3984887  
  1e-04   0.050     10.87032  0.5353168   3.184460  0.3353606  
  1e-04   0.525     12.77484  0.5228639   3.553482  0.4052917  
  1e-04   1.000     10.69082  0.4953061   3.188610  0.3891203  
  1e-01   0.050     10.87552  0.5546255   3.169491  0.3347897  
  1e-01   0.525     12.38126  0.5304466   3.311811  0.3955273  
  1e-01   1.000     10.81320  0.4682376   3.310867  0.3821226  

RMSE was used to select the optimal model using  the smallest value.
The final values used for the model were fraction = 1 and lambda = 1e-04. 
> train(x,y,"enet")
Error in { : 
  task 1 failed - "arguments imply differing number of rows: 3, 2"