RRegrs error with default dataset

> library(RRegrs)

...

There were 50 or more warnings (use warnings() to see the first 50)
> warnings()
Warning messages:
1: replacing previous import by 'pls::R2' when loading 'RRegrs'
2: replacing previous import by 'corrplot::corrplot' when loading 'RRegrs'
3: replacing previous import by 'pls::R2' when loading 'RRegrs'
4: replacing previous import by 'pls::msc' when loading 'RRegrs'
5: replacing previous import by 'pls::prednames' when loading 'RRegrs'
6: replacing previous import by 'pls::mvrValstats' when loading 'RRegrs'
7: replacing previous import by 'pls::svdpc.fit' when loading 'RRegrs'
8: replacing previous import by 'pls::widekernelpls.fit' when loading 'RRegrs'
9: replacing previous import by 'pls::explvar' when loading 'RRegrs'
10: replacing previous import by 'pls::pcr' when loading 'RRegrs'
11: replacing previous import by 'pls::cppls' when loading 'RRegrs'
12: replacing previous import by 'pls::Yscores' when loading 'RRegrs'
13: replacing previous import by 'pls::respnames' when loading 'RRegrs'
14: replacing previous import by 'pls::validationplot' when loading 'RRegrs'
15: replacing previous import by 'pls::corrplot' when loading 'RRegrs'
16: replacing previous import by 'pls::coefplot' when loading 'RRegrs'
17: replacing previous import by 'pls::RMSEP' when loading 'RRegrs'
18: replacing previous import by 'pls::var.jack' when loading 'RRegrs'
19: replacing previous import by 'pls::pls.options' when loading 'RRegrs'
20: replacing previous import by 'pls::compnames' when loading 'RRegrs'
21: replacing previous import by 'pls::jack.test' when loading 'RRegrs'
22: replacing previous import by 'pls::kernelpls.fit' when loading 'RRegrs'
23: replacing previous import by 'pls::oscorespls.fit' when loading 'RRegrs'
24: replacing previous import by 'pls::crossval' when loading 'RRegrs'
25: replacing previous import by 'pls::MSEP' when loading 'RRegrs'
26: replacing previous import by 'pls::mvr' when loading 'RRegrs'
27: replacing previous import by 'pls::loadings' when loading 'RRegrs'
28: replacing previous import by 'pls::Yloadings' when loading 'RRegrs'
29: replacing previous import by 'pls::loading.weights' when loading 'RRegrs'
30: replacing previous import by 'pls::loadingplot' when loading 'RRegrs'
31: replacing previous import by 'pls::predplot' when loading 'RRegrs'
32: replacing previous import by 'pls::simpls.fit' when loading 'RRegrs'
33: replacing previous import by 'pls::stdize' when loading 'RRegrs'
34: replacing previous import by 'pls::plsr' when loading 'RRegrs'
35: replacing previous import by 'pls::cvsegments' when loading 'RRegrs'
36: replacing previous import by 'pls::scores' when loading 'RRegrs'
37: replacing previous import by 'pls::scoreplot' when loading 'RRegrs'
38: replacing previous import by 'RSNNS::confusionMatrix' when loading 'RRegrs'
39: replacing previous import by 'RSNNS::train' when loading 'RRegrs'
40: replacing previous import by 'parallel::stopCluster' when loading 'RRegrs'
41: replacing previous import by 'parallel::mcMap' when loading 'RRegrs'
42: replacing previous import by 'parallel::clusterExport' when loading 'RRegrs'
43: replacing previous import by 'parallel::makePSOCKcluster' when loading 'RRegrs'
44: replacing previous import by 'parallel::parSapplyLB' when loading 'RRegrs'
45: replacing previous import by 'parallel::clusterApplyLB' when loading 'RRegrs'
46: replacing previous import by 'parallel::mclapply' when loading 'RRegrs'
47: replacing previous import by 'parallel::parSapply' when loading 'RRegrs'
48: replacing previous import by 'parallel::clusterSetRNGStream' when loading 'RRegrs'
49: replacing previous import by 'parallel::detectCores' when loading 'RRegrs'
50: replacing previous import by 'parallel::mcparallel' when loading 'RRegrs'

> hmm<-RRegrs()

-(rfe) fit Fold10 size:  2
+(rfe) imp Fold10 size:  2
-(rfe) imp Fold10 size:  2
Error in { : task 1 failed - "undefined columns selected"
In addition: There were 50 or more warnings (use warnings() to see the first 50)
> warnings()
Warning messages:
1: In plot.window(...) : "tl.cex" is not a graphical parameter
2: In plot.window(...) : "title" is not a graphical parameter
3: In plot.window(...) : "method" is not a graphical parameter
4: In plot.window(...) : "is.corr" is not a graphical parameter
5: In plot.window(...) : "cl.lim" is not a graphical parameter
6: In plot.window(...) : "cl.cex" is not a graphical parameter
7: In plot.window(...) : "addgrid.col" is not a graphical parameter
8: In plot.window(...) : "addshade" is not a graphical parameter
9: In plot.window(...) : "addCoef.col" is not a graphical parameter
10: In plot.window(...) : "diag" is not a graphical parameter
11: In plot.xy(xy, type, ...) : "tl.cex" is not a graphical parameter
12: In plot.xy(xy, type, ...) : "title" is not a graphical parameter
13: In plot.xy(xy, type, ...) : "method" is not a graphical parameter
14: In plot.xy(xy, type, ...) : "is.corr" is not a graphical parameter
15: In plot.xy(xy, type, ...) : "cl.lim" is not a graphical parameter
16: In plot.xy(xy, type, ...) : "cl.cex" is not a graphical parameter
17: In plot.xy(xy, type, ...) : "addgrid.col" is not a graphical parameter
18: In plot.xy(xy, type, ...) : "addshade" is not a graphical parameter
19: In plot.xy(xy, type, ...) : "addCoef.col" is not a graphical parameter
20: In plot.xy(xy, type, ...) : "diag" is not a graphical parameter
21: In axis(side = side, at = at, labels = labels, ...) :
  "tl.cex" is not a graphical parameter
22: In axis(side = side, at = at, labels = labels, ...) :
  "title" is not a graphical parameter
23: In axis(side = side, at = at, labels = labels, ...) :
  "method" is not a graphical parameter
24: In axis(side = side, at = at, labels = labels, ...) :
  "is.corr" is not a graphical parameter
25: In axis(side = side, at = at, labels = labels, ...) :
  "cl.lim" is not a graphical parameter
26: In axis(side = side, at = at, labels = labels, ...) :
  "cl.cex" is not a graphical parameter
27: In axis(side = side, at = at, labels = labels, ...) :
  "addgrid.col" is not a graphical parameter
28: In axis(side = side, at = at, labels = labels, ...) :
  "addshade" is not a graphical parameter
29: In axis(side = side, at = at, labels = labels, ...) :
  "addCoef.col" is not a graphical parameter
30: In axis(side = side, at = at, labels = labels, ...) :
  "diag" is not a graphical parameter
31: In axis(side = side, at = at, labels = labels, ...) :
  "tl.cex" is not a graphical parameter
32: In axis(side = side, at = at, labels = labels, ...) :
  "title" is not a graphical parameter
33: In axis(side = side, at = at, labels = labels, ...) :
  "method" is not a graphical parameter
34: In axis(side = side, at = at, labels = labels, ...) :
  "is.corr" is not a graphical parameter
35: In axis(side = side, at = at, labels = labels, ...) :
  "cl.lim" is not a graphical parameter
36: In axis(side = side, at = at, labels = labels, ...) :
  "cl.cex" is not a graphical parameter
37: In axis(side = side, at = at, labels = labels, ...) :
  "addgrid.col" is not a graphical parameter
38: In axis(side = side, at = at, labels = labels, ...) :
  "addshade" is not a graphical parameter
39: In axis(side = side, at = at, labels = labels, ...) :
  "addCoef.col" is not a graphical parameter
40: In axis(side = side, at = at, labels = labels, ...) :
  "diag" is not a graphical parameter
41: In box(...) : "tl.cex" is not a graphical parameter
42: In box(...) : "title" is not a graphical parameter
43: In box(...) : "method" is not a graphical parameter
44: In box(...) : "is.corr" is not a graphical parameter
45: In box(...) : "cl.lim" is not a graphical parameter
46: In box(...) : "cl.cex" is not a graphical parameter
47: In box(...) : "addgrid.col" is not a graphical parameter
48: In box(...) : "addshade" is not a graphical parameter
49: In box(...) : "addCoef.col" is not a graphical parameter
50: In box(...) : "diag" is not a graphical parameter