[R] Rioja package, creating transfer function, WA, "Error in FUN"

[mdc]

Hi, I am a new R user and am trying to construct a palaeoenvironmental
transfer function (weighted averaging method) using the package rioja.
I've managed to insert the two matrices (the species abundance and the
environmental data) and have assigned them to the y and x values
respectively. When I try and enter the 'WA' function though, I get an 'Error
in FUN' message (see below for full values). Alas, I do not know what this
means and have struggled to find similar problems to this online. Is there a
step I've missed out between assigning the matrices and the WA function?  

> SWED=odbcConnectExcel(file.choose())       (SWED is the environmental data
> file)
> sqlTables(SWED)
> Env=sqlFetch(SWED, "Sheet1")
> odbcClose(SWED)
> Env

   SampleId WTD  Moisture   pH         EC         
1  "N1_1"   "20" "91.72700" "3.496674" " 85.02688"
2  "N1_2"   " 2" "93.88913" "3.550794" " 85.69465"
3  "N1_3"   "26" "90.30269" "3.948559" "113.19206"
4  "N1_4"   " 5" "94.14427" "3.697213" " 48.56375"
5  "N1_5"   "30" "90.04269" "3.745020" "108.57278"
....
90 "GAL_15" "70" "94.07849" "3.777932" " 66.77673"


> STEST=odbcConnectExcel(file.choose())
> sqlTables(STEST)                                      (STEST is the
> species abundance file)
> Spe=sqlFetch(STEST, "Sheet8")
> odbcClose(STEST)
> Spe

(The species data contains the abundance of 32 species over 90 sites, set
out like this)
       F1    AmpFlav    AmpWri      ArcCat       ArcDis     
1    N1_1 22.2929936 0.0000000  0.0000000  0.0000000
2    N1_2 30.9677419 0.0000000  0.0000000  3.2258065

> library(rioja)
> y <-as.matrix(Spe)
> x <-as.matrix(Env)

> WA(y, x, tolDW = FALSE, use.N2=TRUE, check.data=TRUE, lean=FALSE)    (the
> command from the WA section of the rioja booklet)
Error in FUN(newX[, i], ...) : invalid 'type' (character) of argument


Any help would be most appreciated, 
Best wishes, 
Matthew
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