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我正在解析 STEP 文件 ISO-10303-21；在java中使用Part21Parser 以下是文件结构

标题；FILE_DESCRIPTION(('STEP AP214'),'1'); FILE_NAME('s25552_b159_a1_13.stp','2016-10-04T07:52:56',(' '),(' '),'Spatial InterOp 3D',' ',' '); FILE_SCHEMA(('automotive_design')); ENDSEC；

 static Model read_file (String filename) throws STDevException, IOException {
           Part21Parser parser = new Part21Parser();
           return parser.parse(filename);
        }

public static void main(String[] args) {

        try {
            Part21Parser parser = new Part21Parser();
            try {
                Model m1 = read_file("D:/Braunschweig_board.stp");

            } catch (IOException e) {

                e.printStackTrace();
            }
        } catch (STDevException e1) {

            e1.printStackTrace();
        }

但是当我运行时，它给出了无法找到架构汽车设计的异常，我不确定它期望什么样的架构以及应该是什么有效架构，因为在线上没有关于此异常的帮助。任何处理 STEP/EXPRESS 文件的人都可以帮忙

以下是堆栈跟踪

com.steptools.stdev.SchemaNotFoundException: Cannot find schema automotive_design
    at com.steptools.stdev.SchemaBase.forName(SchemaBase.java:61)
    at com.steptools.stdev.p21.Part21Parser.getSchema(Part21Parser.java:693)
    at com.steptools.stdev.p21.Part21Parser.getSchema(Part21Parser.java:673)
    at com.steptools.stdev.p21.Part21Parser.getPopulation(Part21Parser.java:547)
    at com.steptools.stdev.p21.Part21Parser.parse_DATA_SECTION(Part21Parser.java:561)
    at com.steptools.stdev.p21.Part21Parser.parse_EXCHANGE_FILE(Part21Parser.java:302)
    at com.steptools.stdev.p21.Part21Parser.parse(Part21Parser.java:230)
    at com.steptools.stdev.p21.Part21Parser.parse(Part21Parser.java:112)
    at com.steptools.stdev.p21.Part21Parser.parse(Part21Parser.java:92)
    at com.steptools.stdev.p21.Part21Parser.parse(Part21Parser.java:80)
    at CadParser.read_file(CadParser.java:26)
    at CadParser.main(CadParser.java:35)
Caused by: java.lang.ClassNotFoundException: com.steptools.schemas.automotive_design.Schema
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.Class.forName0(Native Method)`enter code here`
    at java.lang.Class.forName(Unknown Source)
    at com.steptools.stdev.SchemaBase.forName(SchemaBase.java:59)
    ... 11 more
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