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 FileMaker Pro Custom Functions

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RenameContainterFile ( ~FQFN ; ~NewFileName )

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  Average rating: 4.7  (23 votes)
  Discuss this Custom Function

Mark Geerdes, Technology By Design

This Function will rename the file contained in a container.

Sample Input:
Table::Field ; "NewFile.pdf"
Sample Output:

 Then copy & paste into FileMaker Advanced's Edit Custom Function window.


This function will take the fully qualified field name of the container field, and the new file name and will rename the file that is contained in the container. Because it uses the Base64 functions, it is a little slow, so it might be best practice to Perform Script On Server. If the containers are compressed, you need to add a .gz to the end of the new file name in order to make it work correctly.

Parameters: Fully Qualified Field Name of Container, New Name of File

Created 12/29/2014 - Mark Geerdes

Note: these functions are not guaranteed or supported by Please contact the individual developer with any questions or problems.

This is my Custom Function and I want to edit it


Wonderful find. It even works with externally stored containers. It changes the internally stored name as well as the name of the document itself. 5 Stars

David, Sacramento,Ca
December 09, 2015 4:12pm

Do you have Script

Bob, Little Rock
November 17, 2017 8:00pm

Not sure what you mean. You will need FileMaker Advanced to import the custom function into your file. Then in your script, do a set field command to the container field. In the calculation box, use the name of the Custom Function, and give it the parameters as shown above.

Mark Geerdes, Minneapolis
November 18, 2017 9:46am

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