RBloomberg, blpConnect, java.lang.UnsupportedClassVersionError

[algotr8der]

I recently installed RBloomberg, the Bloomberg APIv3 and rJava.  I tried to execute blpConnect but received the following error. My windows machine has Java 1.5 installed, which to my knowledge appears to be acceptable for RBloomberg/rJava.
Please see further details below. I greatly appreciate your help.

RBloomberg Version 0.4-150
Java environment initialized successfully.
Looking for most recent blpapi3.jar file...
Adding C:\blp\API\APIv3\JavaAPI\v3.4.5.5\lib\blpapi3.jar to Java classpath
Error in .jnew("org/findata/blpwrapper/Connection", java.log.level) :
  java.lang.UnsupportedClassVersionError: Bad version number in .class file
> sessionInfo()
R version 2.14.0 (2011-10-31)
Platform: i386-pc-mingw32/i386 (32-bit)

locale:
[1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United States.1252  
[3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C                          
[5] LC_TIME=English_United States.1252    

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base    

other attached packages:
[1] RBloomberg_0.4-150 rJava_0.9-3      

loaded via a namespace (and not attached):
[1] tools_2.14.0

[algotr8der]

I upgraded the java version to 1.6 just in case....   here is the output of 'java -version':

C:\Documents and Settings\Administrator>java -version
java version "1.6.0_30"
Java(TM) SE Runtime Environment (build 1.6.0_30-b12)
Java HotSpot(TM) Client VM (build 20.5-b03, mixed mode, sharing)

The Bloomberg API v3 works fine in that I can launch the BBAPIDemo app and download historical data etc....  I'm not sure if I need a full JDK installation or if whether the JRE alone is sufficient (I have only installed the JRE). So something is else is going on.

Appreciate the help.

[algotr8der]

Here is the output of the path variables on my machine. Doesn't seem like the JAVA_HOME is set. Is this a requirement? Does the java folder also need to be in the PATH variable?

C:\Documents and Settings\Administrator>echo %path%

C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\blp\API;C:\blp\API\dd
e

C:\Documents and Settings\Administrator>echo %java_path%
%java_path%

C:\Documents and Settings\Administrator>echo $JAVA_HOME
$JAVA_HOME

Anyone have any idea of how I can troubleshoot this going forward? Appreciate the help.

[John Laing]

I think Java 1.6 should be good enough for RBloomberg, but not 1.5.
Possibly R is still using the older version?

You can try something like this:

require(rJava)
.jinit()
jvm <- .jnew("java.lang.System")
jvm.props <- jvm$getProperties()$toString()
jvm.props <- strsplit(gsub("\\{(.*)}", "\\1", jvm.props), ", ")[[1]]

The resulting vector might help highlight issues in your
configuration. Here are a few of the more relevant settings I see from
running the above:

 [2] "sun.boot.library.path=C:\\Java\\jdk1.7.0\\jre\\bin"
[14] "java.runtime.version=1.7.0-b147"
[16] "java.endorsed.dirs=C:\\Java\\jdk1.7.0\\jre\\lib\\endorsed"
[34] "java.specification.version=1.7"
[37] "java.vm.specification.version=1.7"
[38] "java.home=C:\\Java\\jdk1.7.0\\jre"

Hope that helps,
John

On Mon, Dec 19, 2011 at 11:56 AM, algotr8der <[hidden email]> wrote:

> Here is the output of the path variables on my machine. Doesn't seem like the
> JAVA_HOME is set. Is this a requirement? Does the java folder also need to
> be in the PATH variable?
>
> C:\Documents and Settings\Administrator>echo %path%
>
> C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\blp\API;C:\blp\API\dd
> e
>
> C:\Documents and Settings\Administrator>echo %java_path%
> %java_path%
>
> C:\Documents and Settings\Administrator>echo $JAVA_HOME
> $JAVA_HOME
>
> Anyone have any idea of how I can troubleshoot this going forward?
> Appreciate the help.
>
> --
> View this message in context: http://r.789695.n4.nabble.com/RBloomberg-blpConnect-java-lang-UnsupportedClassVersionError-tp4208981p4214817.html
> Sent from the Rmetrics mailing list archive at Nabble.com.
>
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