Error processing CFFILE Unable to move file x to path.

Here is my system info:

server.ColdFusion.ProductLevel = Professional
server.ColdFusion.ProductName = ColdFusion Server
server.ColdFusion.ProductVersion = 5, 0, 0, 0
server.OS.AdditionalInformation = Service Pack 4
server.OS.BuildNumber = 2195
server.OS.Name = Windows NT

We randomly are getting the following:

Error processing CFFILE<P> Unable to move file 'C:\x\file.pdf'  to path 'C:\y\file.pdf' . The process cannot access the file because it is being used by another process. (error 32)<p>The error occurred while processing an element with a general identifier of (CFFILE), occupying document position

Here is the code that it refers to as erroring:

<cffile action="Move" source="#sourceFileName#" destination="#failedFileName#" nameconflict="overwrite"></cfif>

Is the 'Move' code wrong?