I have an access application (vba) that uploads 10 .txt reports, get certains value and store them into access tables. The application and the 10 reports are stored in my company network shared drive, and in a folder that can only be accessed by my department. While it is trying to access the reports, error message "Disk or network error" prompted. However, if i exit and re-run again, there is no longer a problem. What could be the cause? Could it be server down?