Common Errors in FileMaker

Below are some of the most common FileMaker errors that aACE users experience.

Error #301



No more than one person can modify a record at a given time. This error will occur if a user tries to edit a record that another user is editing. Clicking “Edit” within the record may tell you who else is in the record.

This record cannot be modified in this window because it is already being modified in a different window.


This error may occur for one of two reasons: either the user is already editing the record in another window, or the user triggered a process that is modifying the record within the Scripts file, such as opening an order. Logging out and logging back in will resolve the issue if the record was locked by user error.

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