Problem while importing .mpp file to project

Problem while importing .mpp file to project

 I am attempting to import a .mpp file to my project and I am receiving an error message. I select the .mpp file and select import. On the resource selection page, an error message is displayed "Problem while importing". I am not able to proceed nor is more information given to the cause of the error.

Please let me know how to proceed.

Thanks in advance.