Vim 使用 winmanager 合并 NERDTree 和 Taglist 出现下列错误：

Error detected while processing function 24_StartWindowsManager..24_Ed itNextVisibleExplorer..24_FindExplorerInGroup: line 2: E121: Undefined variable: s:explorerGroupNums_1 E15: Invalid expression: s:explorerGroupNums_1 line 4: E121: Undefined variable: numList E116: Invalid arguments for function s:Strntok2(numList, ',', a:memn) E15: Invalid expression: s:Strntok2(numList, ',', a:memn) line 5: E121: Undefined variable: num E15: Invalid expression: num == '' line 8: E121: Undefined variable: num E15: Invalid expression: 'return '.num Error detected while processing function 24_StartWindowsManager..24_Ed itNextVisibleExplorer: line 35: E121: Undefined variable: s:explorerName_0 E15: Invalid expression: s:explorerName_0 line 39: E121: Undefined variable: name E116: Invalid arguments for function exists('*'.name.'_IsPossible')

这报错貌似是 winmanager 相关的 vim 文件里好多定义都不识别。大家看下是什么问题呢？或者有没有什么好的类似插件可以推荐下？