FM FILE_READ_AND_CONVERT_SAP_DATA - file is being opened

Dear experts,

I'm using the FILE_READ_AND_CONVERT_SAP_DATA FM in order to upload an Excel file into an internal table and for some reason, the file itself is being opened and the user is required to close its instance. I didn't see any parameter which handles it.

Does anyone have an idea how I can make this Excel not open?