Thanks Peter! Seems like this should do exactly what I need!

I've tried running a few times now, and I keep running into this error:

Computation done 5%: 11/27/12 18:28:19.435
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Computation done 15%: 11/27/12 18:38:42.941
Computation done 20%: 11/27/12 18:43:58.410
Computation done 25%: 11/27/12 18:49:09.429
Computation done 30%: 11/27/12 18:54:19.376
Computation done 35%: 11/27/12 18:59:32.870
Computation done 40%: 11/27/12 19:04:44.141
Computation done 45%: 11/27/12 19:09:52.581
Computation done 50%: 11/27/12 19:15:01.091
Computation done 55%: 11/27/12 19:20:15.135
Computation done 60%: 11/27/12 19:25:25.774
Computation done 65%: 11/27/12 19:30:35.100
Computation done 70%: 11/27/12 19:35:46.276
Computation done 75%: 11/27/12 19:40:56.277
Computation done 80%: 11/27/12 19:46:09.089
Computation done 85%: 11/27/12 19:51:20.668
Computation done 90%: 11/27/12 19:56:28.789
Computation done 95%: 11/27/12 20:01:38.907
Computation done 100%: 11/27/12 20:06:53.554
Error in gltRes[[ii]] : subscript out of bounds
Calls: paste -> ifelse
Execution halted

And no output is generated... Not sure if this is a shell or a R error..?
Have you ever come across this error? I've tried on two different machines with two different OS (Lion, Snow Leopard) just to be sure it was not some weird compatibility issue but I get the same thing on both.

Thanks in advance for any tips!

Pascale