How to rename file attachment programatically after import?

Hello!

I am adding files manually as Attachments to record.

Since "#" character does some issues in Integromat, I need to remove it from name, after file is uploaded.

My idea is to set "triggerAfterUpdate" function like that, that browses all files and replace "#" to different character.

for thisFile in files(this) do
thisFile.filename := replace(filename, "#", "x");
end

But obviously this doesn't work.

Is there chance to do something like that in Ninox?

Thank you!

Filip