我试图从工具选项卡打开包管理器，但遇到了以下错误：
C:\Users\user\wekafiles\repCache\MultiObjectiveEvolutionaryFuzzyClassifier\versions.txt (系统找不到指定的路径) java.io.FileInputStream.open0(Native Method) java.io.FileInputStream.open(Unknown Source) java.io.FileInputStream.<init>(Unknown Source) java.io.FileInputStream.<init>(Unknown Source) sun.net.www.protocol.file.FileURLConnection.connect(Unknown Source) sun.net.www.protocol.file.FileURLConnection.getInputStream(Unknown Source) weka.core.packageManagement.DefaultPackageManager.getRepositoryPackageVersions(DefaultPackageManager.java:294) weka.core.WekaPackageManager.getRepositoryPackageVersions(WekaPackageManager.java:1734) weka.gui.PackageManager.getPackagesAndEstablishLookup(PackageManager.java:2389) weka.gui.PackageManager.getAllPackages(PackageManager.java:2445) weka.gui.PackageManager.<init>(PackageManager.java:1517) weka.gui.GUIChooserApp$11$1.run(GUIChooserApp.java:822) at java.io.FileInputStream.open0(Native Method) at java.io.FileInputStream.open(Unknown Source) at java.io.FileInputStream.<init>(Unknown Source) at java.io.FileInputStream.<init>(Unknown Source) at sun.net.www.protocol.file.FileURLConnection.connect(Unknown Source) at sun.net.www.protocol.file.FileURLConnection.getInputStream(Unknown Source) at weka.core.packageManagement.DefaultPackageManager.getRepositoryPackageVersions(DefaultPackageManager.java:294) at weka.core.WekaPackageManager.getRepositoryPackageVersions(WekaPackageManager.java:1734) at weka.gui.PackageManager.getPackagesAndEstablishLookup(PackageManager.java:2389) at weka.gui.PackageManager.getAllPackages(PackageManager.java:2445) at weka.gui.PackageManager.<init>(PackageManager.java:1517) at weka.gui.GUIChooserApp$11$1.run(GUIChooserApp.java:822)尝试获取所有包信息时出现问题。正在尝试刷新缓存...刷新进行中，请稍候...然后它下载了默认包管理器：
[DefaultPackageManager] 已下载 13 KB[DefaultPackageManager] 已下载 16 KB[DefaultPackageManager] 已下载 28 KB[DefaultPackageManager] 已下载 50 KB[DefaultPackageManager] 已下载 67 KB[DefaultPackageManager] 已下载 75 KB...[DefaultPackageManager] 已下载 1666 KB然后再次输出了相同的错误。
注意：文件 versions.txt 已正确放置在 C:\Users\user\wekafiles\repCache\MultiObjectiveEvolutionaryFuzzyClassifier 目录中
可能是什么问题呢？
回答：
实际上，你的文件系统中存在的目录是 MultiObjectiveEvolutionaryFuzzyClassifier，少了一个 ‘c’。自己改过来，你就能正常使用了:)
