Could not get file size

Deleted no more excisting files of my forecaster and added a new one
all files I FTP before no problem, the file I added get the error:
550 Could not get file size (see below the ftp logfile)

221 Goodbye. Disconnected. Local directory for Noaa download is D:\Wdisplay\webfiles Retrieving the NOAA file knmi_waarschuwingen_nl.txt now Saving the NOAA file to D:\Wdisplay\webfiles\knmi_waarschuwingen_nl.txt now Connecting to FTP server. Connected. 220 Welcome to the KNMI FTP server ! USER=**** 331 Please specify the password. PASSWORD=**** 230 Login successful. SIZE knmi_waarschuwingen_nl.txt 550 Could not get file size. 141: 550 Could not get file size. QUIT 221 Goodbye.

SIZE ? never noticed before…

It was the file satrep.txt that did not exist anymore (last file then), coming before of the added file in the ftp list, what was causing it