CFpdf Thumbnail Lock

I had this code running a long time on a cold fusion 8 server and no issues. The code basiclly processed pdf documents and created thumbnails from the pdf's. Now, whenever the code runs it puts a lock on the pdf document and can't continue and everytime the code runs it keeps adding locks. I also get this errror:

An error occurred during THUMBNAIL operation in the cfpdf tag.

I've tried cflock but nothing helps. Any ideas? Could it be a new type of pdf coming in? Could it be a patch that Cold Fudion 8 needs?

Code:

<cfsetting requestTimeOut = "999999">

<cfdirectory action="LIST" directory="d:\faxes\" name="GetData" filter="*.pdf">

<cfoutput>

<cfloop query="GetData">

<cfset v_file = "d:\faxes\#GetData.name#">

<cftry>

  <cfpdf action="getinfo" source="#v_file#" name="fullPdf">

  <cfset totalpages = fullPdf.TotalPages>

  <cfpdf action="thumbnail"

  source="#v_file#"

  overwrite="yes"

  destination="d:\faxes\"

  scale=100

  format="png">

  <cffile action="DELETE" file="#v_file#">

  <cfcatch type="Any">

  #v_file#-#cfcatch.message#<br>

  </cfcatch>

</cftry>

</cfloop>

</cfoutput>

Message was edited by: dadress20001