0004537: GeneralAccountingReports does not compile

compileSqlc:
    [javac] Compiling 791 source files to /opt/builds/openbravo-branch-r2.3x/build/classes
    [javac] /opt/builds/openbravo-branch-r2.3x/src/org/openbravo/erpCommon/ad_reports/GeneralAccountingReports.java:145: 
cannot find symbol
    [javac] symbol  : method date(org.openbravo.erpCommon.ad_reports.GeneralAccountingReports,java.lang.String,java.lang.String)
    
[javac] location: class org.openbravo.erpCommon.ad_reports.GeneralAccountingReportsData
    [javac]     if (strDateTo.equals("")) strDateTo = GeneralAccountingReportsData.date(this, 
strAgno, vars.getSqlDateFormat());
    [javac]                                                                       ^
    [javac] /opt/builds/openbravo-branch-r2.3x/src/org/openbravo/erpCommon/ad_reports/GeneralAccountingReports.java:147: 
cannot find symbol
    [javac] symbol  : method date(org.openbravo.erpCommon.ad_reports.GeneralAccountingReports,java.lang.String,java.lang.String)
    
[javac] location: class org.openbravo.erpCommon.ad_reports.GeneralAccountingReportsData
    [javac]     if (strDateToRef.equals("")) strDateToRef = GeneralAccountingReportsData.date(this, 
strAgnoRef, vars.getSqlDateFormat());
    [javac]                                                                             ^
    [javac] Note: /opt/builds/openbravo-branch-r2.3x/src/org/openbravo/erpCommon/businessUtility/AccountTree.java 
uses unchecked or unsafe operations.
    [javac] Note: Recompile with -Xlint:unchecked for details.
    [javac] 2 errors