ftp filewatcher case insenstive

Right now I am checking every 10 minutes for file to exist on a ftp server.
File I am checking for recently started coming in lower case one day and uppercase the next day.

example of how I am currently doing the FTPFileExists,

// Append file extension
Concat( "XXX/ABC_DEF" ,".CSV", file_name )

CHECK_FOR_FILE:
// Watch for file on remote FTP site.
FTPFileExists "ftp.xxxxx.com", "xxxx", "xxxx",file_name, file_found
ifthen file_found, RUN_JOB, TIMEOUT

TIMEOUT:
// wait 600 seconds then try again
Wait 600
Add wait_time, 600, wait_time

// check if we are waiting already too long (more than 30 minutes)
isGreater wait_time, 7200, timeout
if timeout, NOTIFY, TRY_LATER

Is there a way to write FTPFileExists to be case insensitive?

Thanks for any help or suggestions.

You can use FTPDir to get the full file listing, then convert the output to lower case and search for the required file name in lower case. Hope that helps.