Vista - Do while fso.FileExists() question

Have a log file from a ftp session started with vbs script.

This script:
1. Downloads the ftp log to my local hard drive as "c:\ftp.log"
2. Opens "ftp.log" for reading.
3. Read one line at a time.
4. If string "Yada-Yada" is found in "ftp.log"
(usually in the 1st or 2nd line)
data set on MVS mainframe is ready to be downloaded,
5 Open another ftp session and download mainframe data set
6. fso.DeleteFile("c:\ftp.log") and exit sub

However, if the string "Yada-Yada" is NOT found in "ftp.log" then
Wscript.sleep xxxxxx
start another ftp session starting back at step #1.

Keep running this ftp script every "X" (wscript.sleep) number of
minutes
until the MVS mainframe job is complete as evidenced in the
refreshed "c:\ftp.log" on my hard drive.
MVS job could take hours.

I tried Do While fso.FileExists("c:\ftp.log")
with ftp.log being deleted
via fso.DeleteFile("ftp.log") upon successful
reading of the "Yada-Yada" string
(so that should stop the process as "C:\ftp.log" no longer
exists????)
but it seems cumbersome, not to mention it doesn't work.

How would I loop back through a process, terminating only if a certain
string is found in a file that is re-downloaded every "X" number of
minutes?

JumboShrimps wrote:If this pseudo code does not help, post your code and explain what it does
and what should happen and where.

Do
If fso.FileExists("c:\ftp.log") Then
'Read file for "Yada-Yada"
If found Then
'.DeleteFile...
'download dataset
Exit Do
End If
Else
'File does not exist.
'Either keep looping or Exit Do
End If
Sleep xxx...
Loop

--
Todd Vargo
(Post questions to group only. Remove "z" to email personal messages)