在 Windchill PDMLink 中尝试使用自定义导出/导入实用程序导出 CAD 数据集合时出现错误，失败

wt.util.WTRemoteException: Unable to invoke remote method; nested exception is:
        java.rmi.ServerRuntimeException: Server exception; nested exception is:
        java.lang.IllegalArgumentException: wt.util.WTException: Mapping information not found for data exchange format STEP_FORMAT
        at wt.method.RemoteMethodServer.invoke(RemoteMethodServer.java:898)
        at ext.gavintest.ExpUtil4.invoke(ExpUtil4.java:39)
        at ext.gavintest.ExpUtil4.main(ExpUtil4.java:30)
Caused by: java.lang.IllegalArgumentException: wt.util.WTException: Mapping information not found for data exchange format STEP_FORMAT
        ... 3 more
Caused by: wt.util.WTException: Mapping information not found for data exchange format STEP_FORMAT
        at wt.ixb.impl.jaxb.Multiformat.getFormat(Multiformat.java:501)
        at wt.ixb.impl.jaxb.Multiformat.getProtocolName(Multiformat.java:444)
        at wt.ixb.clientAccess.IXFormatTypeHelper.getIXFormatType(IXFormatTypeHelper.java:81)
        at ext.gavintest.ExpUtil4.test(ExpUtil4.java:56)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at wt.method.MethodResultWriter.writeExternal(MethodResultWriter.java:165)
        at wt.method.MethodResult.writeExternal(MethodResult.java:226)
        at java.base/java.io.ObjectOutputStream.writeExternalData(ObjectOutputStream.java:1457)
        at java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1431)
        at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179)
        at java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:349)
        at java.rmi/sun.rmi.server.UnicastRef.marshalValue(UnicastRef.java:293)
        at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:369)
        at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:200)
        at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:197)
        at java.base/java.security.AccessController.doPrivileged(Native Method)
        at java.rmi/sun.rmi.transport.Transport.serviceCall(Transport.java:196)
        at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:562)
        at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:796)
        at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:677)
        at java.base/java.security.AccessController.doPrivileged(Native Method)
        at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:676)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at java.base/java.lang.Thread.run(Thread.java:834)