Using WS_FTP Professional, I have a backup process that runs every night.
WS_FTP basically sets up the process to FTP to a remote server through windows scheduler. Specifically, It sends an XML file that is approximately 2.5 megs to a server for download.
I check that the XML file is well-formed before the FTP and it always is. The problem I am having is that after is get's uploaded to the server through my backup process, the xml file becomes not well-formed. If I download the file and check the line number where the error/s occur there is usually either just random numbers/letters, a broken tag, or a "NULL" symbol.
I've checked that WS_FTP isn't compressing or encrypting the file before sending it, and it's sending the file in ASCII mode.
It happens, seemingly random. Sometimes the upload works fine, other times the errors occur.
If I upload the same file 10 times then about 8 of those times the file will have the errors and they will always occur on the same line (6481). The file get's updated daily, so tomorrow if I upload the file, I'll get the same number of errors but it may be on a different line, almost as if the error is occurring after a set number of characters (if that makes any sense).
If anybody can make sense of this I'd greatly appreciate it. It's driving me nuts.
UPDATE
I just ran a couple of tests and it looks like it is in fact happening on the same byte.
UPDATE 2
The problem was with WS_FTP. Not exactly sure what it was but I tried a different FTP client it worked.