Error attempting to process incomplete inbound FTP file

We are currently receiving some large files into PI via FTP.  Here is the communication channel definition:
Adapter Type:  File
Transport Protocol:  File System (NFS)
Message Protocol:  File
Adapter Engine:  Integration Server
Poll Interval (secs):  600
Msecs to Wait Before Modification Check:  10000
Our issue is that at times PI attempts to process the file before it has completed uploading, and throws this error:  "Attempt to send file failed because file was modified during processing. 2428928 bytes expected, 2675033 bytes found. Trying to resend file".  The next time the file system is polled for new files, PI selects and processes the file successfully. 
Two questions:
1)  Is it possible for PI to wait until the upload has fully completed before it attempts to process the file?  For example, can I run an operating system command before message processing which attempts to put a lock on the file and waits until it is successful before the file is processed?
2)  We have implemented alert monitoring from Solution Manager for errors in PI.  These cases are throwing an alert upon the initial error, but these turn out to be false since the message is eventually processed successfully.  Can I configure Solution Manager to bypass this type of error?
Thank you very much for your help with this.

Hi Mark,
>>>1) Is it possible for PI to wait until the upload has fully completed before it attempts to process the file? For example, can I run an operating system command before message processing which attempts to put a lock on the file and waits until it is successful before the file is processed?
there is an easy way to achive it
put the file with a different name (let's say .lfg extension for flag)
after the application finishes uploading make sure it will also change the name to .xml etc.
inside PI file adapter specify to upload only .xml extensions - this way it will only take the whole file
>>>>2
as for solman question if you do like I suggest you will not have the errors in solman
Regards,
Michal Krawczyk

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