[R-sig-ME] MCMCglmm error message:Error in `[.data.frame undefined columns selected

[PATRICK, Samantha]

Hi

I am having problems with an error message in MCMCglmm.  I am trying to partition the variance in the model so that each group has its own estimated variance.  Originally I had a more complicated model but I have simplified it below to show the source of the problem (so the prior is not optimised for this model and only part of the data set is given).  If I fit random = ~GroupA, it runs ok, but if I add in ~us (GroupA):units it gives the error:

Error in `[.data.frame`(data, , components$rterms[select.terms]) :
undefined columns selected

Previous posts have suggested it may be because the variables do not exist but it is not this.  I have tried other variants but I keep getting the same error.  I have changed all the variable names in case there was a double with a function but still no luck.

Does anyone have any ideas? The same error occurs if you just try to fit the rcov statement (with units).  I thought there could be a problem estimating the units term perhaps and so it can not find the residual variance.  But if I try other terms in its place I get the same error

Thanks

Sam

Script
library(MCMCglmm)

prior2.1 <- list(R = list(V= 1, nu =0.002), G = list(G1 = list(V =diag(4), nu = 1.002)))

mod2.1<- MCMCglmm(DistanceA ~FixedA, random = ~us(GroupA):units,
# rcov = ~idh(GroupA):units,
prior = prior2.1,
data=h,
pr=TRUE,  burnin = 200, nitt = 5000000, thin = 200)




Data

IDA     DistanceA       FixedA  GroupA
1       35.76203413     12      A
1       353.8044206     26      A
1       28.6894637      14      A
1       302.9190056     16      A
1       308.7219701     23      A
2       173.9284996     111     B
2       231.2895313     37      B
2       223.0156577     11      B
2       257.7869899     27      B
3       308.3258686     110     A
3       178.3784977     37      A
3       218.3712172     15      A
4       288.5865862     65      B
5       54.62104181     20      A
5       310.5786671     118     A
5       185.3627266     18      A
5       300.8304258     51      A
6       461.4315924     75      B
6       496.403949      52      B
7       708.2367263     181     B
7       214.8704587     35      B
8       183.6161529     44      A
8       183.326292      21      A
8       319.0479119     39      A
9       269.6319359     79      B
9       325.1318986     98      B
9       399.208417      99      B
10      135.2138385     50      B
10      162.9959776     67      B
11      49.05385099     17      A
11      80.92750054     26      A
11      184.7205464     16      A
12      327.6768626     47      A
29      240.6830677     85      C
29      126.9140906     23      C
29      216.4021125     29      C
29      168.8125168     52      C
30      230.8613452     25      D
30      134.8893388     38      D
30      164.2181205     48      D
30      140.8627105     55      D
31      15.51295239     6       D
31      42.45851533     3       D
31      16.30773693     4       D
31      89.57289202     20      D
31      108.0256345     115     D
32      118.2199077     12      D
32      247.9492249     26      D
32      18.20298953     15      D
32      70.97933919     20      D
32      109.7264855     36      D
32      101.8653273     19      D
32      68.54583069     7       D
33      24.1465819      7       C
33      67.33233486     75      C
33      64.92951246     31      C
33      94.90538004     53      C
34      474.3625341     171     C
54      150.6926733     43      D
54      191.6157478     58      D
54      127.1248342     14      D
55      385.2042737     42      D
55      202.8058375     23      D
55      144.4546654     44      D
56      194.0171206     81      D
56      163.6960289     40      D
57      122.5337279     89      D
57      172.2405156     44      D
57      206.4998878     79      D
57      122.677563      19      D
58      147.3699167     31      D
59      140.7191172     84      D
59      241.2723386     50      D
59      230.1874477     83      D
60      130.6675375     101     D
60      104.4518299     9       D
60      134.473374      56      D
61      135.7597774     17      D
61      232.3798885     40      D
62      164.1352534     65      D
62      259.1312989     28      D
63      177.8687393     145     C
63      121.3886107     43      C
64      202.009693      43      D
64      218.7044853     41      D

Dr Samantha Patrick
Research Fellow
Biosciences QU116
Francis Close Hall Campus
University of Gloucestershire
Cheltenham
GL50 4AZ
UK

Research Associate: ABRG, University of Oxford

Tel : +44 1242 714 668
Skype: sammy_patrick

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