Press 'import data' button, there came "uiimport error"

when I press the "import data" in the UI, there came an error as following:

error using uiimport (line 145)
Java exception occurred:
java.lang.NullPointerException

	at java.util.Collections.addAll(Collections.java:5400)

	at com.mathworks.mlwidgets.workspace.ImportFileChooser.setupExtensionsForDropDown(ImportFileChooser.java:47)

when i input "uiimport" in the command window, there came the warnings and errors as following(my matlab is Chinese version):

 警告: 执行 'multimedia.internal.audio.file.PluginManager' 类析构函数时，捕获到以下错误:
MEX 文件 'D:\matlab2018\toolbox\shared\multimedia\+multimedia\+internal\+audio\+file\private\mexAudioPluginManager.mexw64' 无效: 缺少依赖共享库:
'D:\matlab2018/bin/win64\avfileiopluginmanager.dll->D:\matlab2018\toolbox\shared\multimedia\+multimedia\+internal\+audio\+file\private\mexAudioPluginManager.mexw64' 需要 'tamutil.dll'
'D:\matlab2018\toolbox\shared\multimedia\+multimedia\+internal\+audio\+file\private\mexAudioPluginManager.mexw64' 需要 'tamutil.dll'。

出错 multimedia.internal.audio.file.PluginManager/delete (line 159)
            mexAudioPluginManager('destroyPluginManager');

出错 multimedia.internal.audio.file.PluginManager (line 164)
        function obj = PluginManager

出错 multimedia.internal.audio.file.PluginManager.getInstance (line 248)
                localInstance = multimedia.internal.audio.file.PluginManager();

出错 internal.matlab.importtool.ImportableFileExtension>localAudioExtn (line 118)
        fileExtTmp = multimedia.internal.audio.file.PluginManager.getInstance.ReadableFileTypes;

出错 internal.matlab.importtool.ImportableFileExtension>importToolRecognizableFileDropdownInfo (line 179)
dropdownList = {getString(message('MATLAB:codetools:uiimport:AudioFormatStr')),localAudioExtn(true);...

出错 internal.matlab.importtool.ImportableFileExtension.getImportToolFileChooserDropDownInfo (line 71)
            [fileExtnDesc, fileExtList] = importToolRecognizableFileDropdownInfo;

出错 uiimport (line 144)
    [fileExtDesc, fileExtList] = ImportableFileExtension.getImportToolFileChooserDropDownInfo; 
> In multimedia.internal.audio.file.PluginManager (line 164)
  In multimedia.internal.audio.file.PluginManager.getInstance (line 248)
  In internal.matlab.importtool.ImportableFileExtension>localAudioExtn (line 118)
  In internal.matlab.importtool.ImportableFileExtension>importToolRecognizableFileDropdownInfo (line 179)
  In internal.matlab.importtool.ImportableFileExtension.getImportToolFileChooserDropDownInfo (line 71)
  In uiimport (line 144) 
警告: 转义字符 '\m' 无效。有关支持的特殊字符，请参阅 'doc sprintf'。 
> In internal.matlab.importtool.ImportableFileExtension>localAudioExtn (line 121)
  In internal.matlab.importtool.ImportableFileExtension>importToolRecognizableFileDropdownInfo (line 179)
  In internal.matlab.importtool.ImportableFileExtension.getImportToolFileChooserDropDownInfo (line 71)
  In uiimport (line 144) 
警告: MEX 文件 'D: 
> In internal.matlab.importtool.ImportableFileExtension>localAudioExtn (line 121)
  In internal.matlab.importtool.ImportableFileExtension>importToolRecognizableFileDropdownInfo (line 179)
  In internal.matlab.importtool.ImportableFileExtension.getImportToolFileChooserDropDownInfo (line 71)
  In uiimport (line 144) 
警告: 执行 'matlab.internal.video.PluginManager' 类析构函数时，捕获到以下错误:
MEX 文件 'D:\matlab2018\toolbox\shared\multimedia\+matlab\+internal\+video\private\mexVideoPluginManager.mexw64' 无效: 缺少依赖共享库:
'D:\matlab2018/bin/win64\avfileiopluginmanager.dll->D:\matlab2018\toolbox\shared\multimedia\+matlab\+internal\+video\private\mexVideoPluginManager.mexw64' 需要 'tamutil.dll'
'D:\matlab2018\toolbox\shared\multimedia\+matlab\+internal\+video\private\mexVideoPluginManager.mexw64' 需要 'tamutil.dll'。

出错 matlab.internal.video.PluginManager/delete (line 188)
            mexVideoPluginManager('destroyPluginManager');

出错 matlab.internal.video.PluginManager (line 193)
        function obj = PluginManager

出错 matlab.internal.video.PluginManager.getInstance (line 270)
                localInstance = matlab.internal.video.PluginManager();

出错 VideoReader.getFileFormats (line 222)
            extensions = PluginManager.getInstance().ReadableFileTypes;

出错 internal.matlab.importtool.ImportableFileExtension>localVideoExtn (line 92)
        videoFileFormats = VideoReader.getFileFormats;

出错 internal.matlab.importtool.ImportableFileExtension>importToolRecognizableFileDropdownInfo (line 190)
        getString(message('MATLAB:codetools:uiimport:VideoFormatStr')),localVideoExtn(true);...

出错 internal.matlab.importtool.ImportableFileExtension.getImportToolFileChooserDropDownInfo (line 71)
            [fileExtnDesc, fileExtList] = importToolRecognizableFileDropdownInfo;

出错 uiimport (line 144)
    [fileExtDesc, fileExtList] = ImportableFileExtension.getImportToolFileChooserDropDownInfo; 
> In matlab.internal.video.PluginManager (line 193)
  In matlab.internal.video.PluginManager.getInstance (line 270)
  In VideoReader.getFileFormats (line 222)
  In internal.matlab.importtool.ImportableFileExtension>localVideoExtn (line 92)
  In internal.matlab.importtool.ImportableFileExtension>importToolRecognizableFileDropdownInfo (line 190)
  In internal.matlab.importtool.ImportableFileExtension.getImportToolFileChooserDropDownInfo (line 71)
  In uiimport (line 144) 
警告: 转义字符 '\m' 无效。有关支持的特殊字符，请参阅 'doc sprintf'。 
> In internal.matlab.importtool.ImportableFileExtension>localVideoExtn (line 96)
  In internal.matlab.importtool.ImportableFileExtension>importToolRecognizableFileDropdownInfo (line 190)
  In internal.matlab.importtool.ImportableFileExtension.getImportToolFileChooserDropDownInfo (line 71)
  In uiimport (line 144) 
警告: MEX 文件 'D: 
> In internal.matlab.importtool.ImportableFileExtension>localVideoExtn (line 96)
  In internal.matlab.importtool.ImportableFileExtension>importToolRecognizableFileDropdownInfo (line 190)
  In internal.matlab.importtool.ImportableFileExtension.getImportToolFileChooserDropDownInfo (line 71)
  In uiimport (line 144) 

I guess there might lose some library . When have ever met the similar problem? Thanks a lot for helping me solve this problem

[Walter Roberson]

Are you asking to uiimport a video?

Answer 1

[Arnav Dubey]

As per my knowledge, a workaround would be , you may use "uiimport" specifying the full path to the file:

>> uiimport('c:\myfiles\myfile.xlsx')

and maybe then try if you are able to reproduce the same error.