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 FileMaker Pro Custom Functions

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FilterFileName ( text ; filetype )

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  Average rating: 4.6  (33 votes)
  Discuss this Custom Function

Michael Myett, FileMaker Apps

filtering field contents as a file name when exporting record set to Excel or Acrobat file

Sample Input:
Filter File Name ( team , 1 )
Sample Output:
red sox.xls

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

Click here to copy To Clip Manager if you have myFMbutler's Clip Manager installed


FileMaker allows you to export record sets to either an Excel or Acrobat file. If you are using a scripted export routine using some field contents as an automated file name, this function will filter any characters that would cause a illegal file name ( in windows ). This will avoid an error when running your script, by removing illegal characters.

For example, use the formula to set a variable in a script which exports a record set to an Excel or Acrobat file. The variable would create a filtered file name with illegal characters removed. This is good for Windows only. Sorry. I don't have access to a Mac to work that out and believe there are some different characters. Anyone who would like to add to this for Mac, feel free.

Make file type = 1 to add a Excel file extension to file name or file type = 2 for Adobe Acrobat file extension.

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


I would change the second parameter to be the extension. That way this function could also be used when exporting container contents.

Sean, Birmingham
March 03, 2011 7:50pm

Exactly what I was looking for. Thank you so much!

Denise, Boston
March 28, 2014 3:24pm

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