MDF file cannot be opened

I try to import a MDF file into Simulink Data inspector, but it promps out "Invalid or no file specified"

Any idea what is this issue?

[Walter Roberson]

• MDF file — MDF file import is supported for Linux® and Windows® operating systems. The MDF file must have a .mdf, .mf4, .mf3, .data, or .dat file extension and contain data with only integer and floating data types.

Please confirm that you are using one of those file extensions and that your file contains only those data types.

[Hsien Yan Gan]

Hi @Walter Roberson thks for your reply. Do you know how to check whether it have mdf ,mf4 file? As the same file could be opened on another PC, the file should be valid.