wildcards are not acceptable in file paths. They must be a static path to the file.
There are a few plugins like BaseElements or Troi File that have plugin functions that will read the filenames in a specific folder.
You could use that to walk a list of files and import the ones you need via patterncount
EG via BaseElements: BE_ListFilesInFolder – BaseElements Plugin Help Centre
something like this:
Set Variable [ $folder ; Get(DesktopPath) & Amplifications::QC01_Plate_ID & "/" ]
Set Variable [ $files ; BE_ListFilesInFolder( $folder ; "Files" ) ]
Set Variable [ $i ; $i + 1 ]
Set Variable [ $file ; GetValue( $files ; $i ) ]
If [ patterncount($file; ".BMP") > 0 ]
Insert File [ $file ]
Exit Loop If [ $i = ValueCount( $files ) ]
To add to that, if you place your files somewhere inside the document folder, you can parse the list of files from documents without use of a plug-in.
Use with caution!
Unless you are running the function on a server, the Get(DocumentsPath) function is going to try to return the file/folder list for the active users documents folder. The Finder reports that my documents folder contains in excess of 59,000 items and the few times that I have triggered the Get(DocumentsPath) on my machine I've had a long wait for it to return a result.
Or, you can make a file name list table (need only name and full path) then "Import folder" to fill it.
Importing all names at once, then find matched one. Or, make validation "always" for filename matching finding one, then import filters.
validation for filename (or full path):
set $$fn as Amplifications::FA_name_exportable & ".BMP", then only matched files are imported.