Filemaker Pro Error on retrieving records

Hi guys,

I am using our inventory application under file maker pro, when I am about to retrieve a record ,I meet an error it tells that no record was present, please below the error message and its options.

No records are present. To create a new record choose

the New Record menu command.

When I saw the error message, first came to my mind is the record was deleted, since I have used that record a while ago and edited it, I know its present, I don't remember  deleting the record, and nobody is also using the application, since its only installed in my computer, and not shared across the network, I am wondering what might be the cause of this record loss, please share some ideas on my problem, thanks guys