Setting value to OD variables in Servlet node:
mySession.getVariableField(IProjectVariables.C__COUNTS,IProjectVariables.C__COUNTS_FIELD_MAXNI).setValue("");
Writing trace info
TraceInfo.trace(ITraceInfo.TRACE_LEVEL_INFO,this.getClass().getName() + " -> Value - " + mySession.getVariableField("OD", "OD_complex").getStringValue(), mySession);