SoapUI Pro Groovy！错误：BUG！源中的“语义分析”中的异常类名

ReadyAPI’语义分析’错误.我已经将我的脚本库存储在bin文件夹中,并且我正在从ReadyAPI的groovy测试脚本中调用getBuildingInfo方法.大多数时候这种方法工作正常,但有一段时间我得到了这个错误.我想找出确切的问题并找出根本原因.
我在 eclipse中测试了代码,它工作得非常好.

ERROR:BUG! exception in phase ‘semantic analysis’ in source unit ‘Script15.groovy’ The lookup for PropertiesQuery caused a failed compilaton. There should not have been any compilation from this call.
BUG! exception in phase ‘semantic analysis’ in source unit ‘Script15.groovy’ The lookup for PropertiesQuery caused a failed compilaton. There should not have been any compilation from this call.

14: Apparent variable ‘Database‘ was found in a static scope but doesn’t refer to a local variable,static field or class. Possible causes:
You attempted to reference a variable in the binding or an instance variable from a static context.
You misspelled a classname or statically imported field. Please check the spelling.
You attempted to use a method ‘Database’ but left out brackets in a place not allowed by the grammar.
@ line 14,column 17.
def dbConn = Database.getDbConnection(env);

public class Database {

public static Connection getDbConnection (String env){

    Connection conn = null;
    Class.forName("com.mysql.jdbc.Driver")

    switch (env){
        case "TEST":
            conn = DriverManager.getConnection("a","b","c")
            break;
        case "DEV":
            conn = DriverManager.getConnection("a","d")
            break;
    }

    return conn;
}

public static void closeDbConnection(Connection conn) {

    conn.close();
}
}  


class PropertiesQuery {
    public static String getBuildingInfo(String env,String id,int row ){
        String result = "111";


        def query = "SELECT col1,col2 FROM tabl1 WHERE id = 1"

        def dbConn =  Database.getDbConnection(env);
        def stmt = dbConn.createStatement()
        def rs = stmt.executeQuery(query);

        while(rs.absolute(row)){
            rs.getString("col1")
            rs.getString("col2")

            result = rs.getString("col1") +"/"+rs.getString("col2")
            return result;
        }
    }   
}

jdbcConnections() {

}

def getJdbcConnection(conDetails,log) {

    def connString = conDetails.getConnectionString()
    def url = 'jdbc:oracle:thin:' + connString.substring(connString.indexOf('@'),connString.size());
    def userName = connString.replace('jdbc:oracle:thin:','');
    userName = userName.substring(0,userName.indexOf('/'));
    def password = connString.substring(connString.indexOf('/') + 1,connString.indexOf('@'));

    log.info('      Connecting to database ' + conDetails.getName() + '.  Using account ' + userName + ' at URL ' + url );

    return Sql.newInstance(url,userName,password,conDetails.getDriver());

}

def getJdbcConnection(conDetails)
{
    def connString = conDetails.getConnectionString()
    def url = 'jdbc:oracle:thin:' + connString.substring(connString.indexOf('@'),connString.indexOf('@'));

    return Sql.newInstance(url,conDetails.getDriver());
}