RMPI Question

Dear R Users,

I have a relatively simple rmpi question. 

My configation is:
- R version 2.7.2
- rmpi 0.5-6
- Deino MPI 1.1.0
- Windows XP SP2

After succesfully spawning slaves, I am trying to assign values to 
variables in the environment of each slave and run some simple calcs. This 
appears to fail, as below: my assignment of value "1" to variable "a" 
appears to come back OK, but then when I try and retrieve it, it fails. 

Could someone please point out what I might be doing wrong ? 

I spawn 8 slaves below, but have deleted the output from slaves 3-7 just 
to save space and make the output easier to read.

mpi.spawn.Rslaves() 

        8 slaves are spawned successfully. 0 failed.
master (rank 0, comm 1) of size 9 is running on: Personal 
slave1 (rank 1, comm 1) of size 9 is running on: Personal 
slave2 (rank 2, comm 1) of size 9 is running on: Personal 
...
slave8 (rank 8, comm 1) of size 9 is running on: Personal 

mpi.remote.exec(paste("I am",mpi.comm.rank(),"of",mpi.comm.size())) 

$slave1
[1] "I am 1 of 9"

$slave2
[1] "I am 2 of 9"
...
$slave8
[1] "I am 8 of 9"

mpi.remote.exec(eval(assign("a","1")))

$slave1
[1] "1"

$slave2
[1] "1"
...
$slave8
[1] "1"

mpi.remote.exec(a <<- 2)

mpi.remote.exec(a)

mpi.bcast.cmd(a <- 1)
mpi.remote.exec(a)

mpi.remote.exec(get("a", .GlobalEnv))

mpi.remote.exec(eval(assign("b","2")))

$slave1
[1] "2"

$slave2
[1] "2"
...
$slave8
[1] "2"

mpi.remote.exec(a)

$slave1
[1] "Error in eval(expr, envir, enclos) : object \"a\" not found\n"
attr(,"class")
[1] "try-error"

$slave2
[1] "Error in eval(expr, envir, enclos) : object \"a\" not found\n"
attr(,"class")
[1] "try-error"
...
$slave8
[1] "Error in eval(expr, envir, enclos) : object \"a\" not found\n"
attr(,"class")
[1] "try-error"


Thanks in advance,
Tolga

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