FPTGetFile Error 32

When running the built in FTPGetFile comman in a script, on occasions we receive the following error:

An error occurred while executing automation script Line 3: Download failed for "". Unknown error occurred, error code 32.
is not a big file just 635KB
The form of my script is simple

////////////////////////////////////////////////////////////
FTPConfig( "TRANSFER MODE", "ASCII" )
FTPGetFile "mainframe", "user", "pw", "'xx.xxx.xxxxxxx(0)'", "e:\\trig\\tab\\xxxTBLE.TXT"
Exit

This does not occur all the time and I have not been able to find other log in my server to get a better diagnostic.
Has anyone seen this behavior before?

FTP error code 32 means FTP couldn't use SIZE. The SIZE command failed. The command is an extension to the original FTP spec RFC 959.

Because it doesn't happen all the time, it's very likely a bad timing issue. My hypothesis is that the file is not the server is being written when you are trying to grab it, and that's why the SIZE query fails. I suggest adding an automatic retry to this job, for example after a few minutes. You can use job retry options for this purpose.