one problem when i use package JRI

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I use the JRI package in java to do some compute with R

but  i haved one  problem


               re.eval("library(lattice)");             //????????????????????????
               y=re.idleEval("print(1:10)");
               y=re.eval("feq <- read.delim('c:/minist.txt',header=T)");
               y=re.eval("feq1<-as.matrix(feq)");
               System.out.println(y=re.eval("feq1[1,]"));
               y=re.eval("jpeg()");
               y=re.eval("levelplot(feq1)");
               re.eval("dev.off()");
               re.end();
               System.out.println("end");


this block  can't run  , and  system warn :WARNING: org.rosuda.JRI.Mutex was
unlocked by other thread than locked! This may soon lead to a crash...
wwhwwhen i delete :  re.eval("library(lattice)");     this program  can
run
WHY?? can somebody  help me?


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Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
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