OmniRPC User's Guide Version 1.2: http://www.omni.hpcc.jp/omnirpc/
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Setting of Login name

In addition, if the user name is different on client host and remote host, describe hostfile.xml as follows. 

<?xml version="1.0" ?>
<OmniRpcConfig>
   <Host name="dennis.hpcc.jp" user="foo" arch="i386" os="linux">
   <Agent invoker="ssh" mxio="on"  />
   </Host>
</OmniRpcConfig>
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