java - 使用 Comsol API 在 Java 中出现 FlException：无法获取用户名和密码

Question

Eclipse 中 Comsol Api 的 java 编程中的 FlException 是什么意思，我该如何摆脱它？

 Exception in thread "main" Exception:
    com.comsol.util.exceptions.FlException: No user name and password could be obtained
Messages:
    No user name and password could be obtained

Stack trace:
    at com.comsol.clientapi.engine.APIEngine.connect(SourceFile:84)
    at com.comsol.clientapi.engine.ClientModelUtil.connect(SourceFile:145)
    at com.comsol.clientapi.engine.ClientModelUtil.connect(SourceFile:133)
    at com.comsol.model.util.ModelUtil.connect(SourceFile:248)
    at tapered_cantilever.main(tapered_cantilever.java:304)