CAD Worker fails to publish with error message: " java.io.IOException: There are no more files" in Creo View adapters

• CAD worker job fails with error message java.io.IOException: There are no more files
• CAD worker jobs fail if more than one is publishing
• Issue is sporadic and jobs can succeed when resubmitted
• Possible Errors in WVS job monitor:
  • Problem copying all files java.io.IOException: There are no more files
  • Part Processing Returned: $ERROR$ Problem copying all files java.io.IOException: There are no more files
  • CadAgent Returned: $ERROR$ Problem copying all files java.io.IOException: There are no more files
  • CadAgent Returned: $ERROR$ Problem creating directory via FTP java.io.IOException: 450 Internal error creating the directory
• Methodserver log shows error:-

ERROR wt.wvs.workeragent.Worker  - There are no more files java.io.IOException: There are no more files
    at java.base/java.io.WinNTFileSystem.canonicalize0(Native Method)
    at java.base/java.io.WinNTFileSystem.canonicalize(WinNTFileSystem.java:483)
    at java.base/java.io.File.getCanonicalPath(File.java:626)
    at org.apache.commons.io.FileUtils.copyFile(FileUtils.java:873)
    at org.apache.commons.io.FileUtils.copyFile(FileUtils.java:835)
    at org.apache.commons.io.FileUtils.copyFile(FileUtils.java:802)
    at com.ptc.wvs.server.util.Util.copyFile(Util.java:904)
    at com.ptc.wvs.server.util.Util.copyDir(Util.java:838)
    at com.ptc.wvs.server.util.Util.copyDir(Util.java:754)
    at com.ptc.wvs.server.cadagent.Worker.copyAllFiles(Worker.java:1445)
    at com.ptc.wvs.server.cadagent.ShapeType.prepareForJobConversion(ShapeType.java:1133)
    at com.ptc.wvs.server.cadagent.ShapeType.prepareForConversion(ShapeType.java:710)
    at com.ptc.wvs.server.cadagent.ShapeType$Prepare.run(ShapeType.java:2199)

• Related symptoms
  • $ERROR$ Helper: Connection to worker has been closed. Shutting down...
  • Multiple Creo workers configured in the same server using the -DA option and if more than 1 is starting to publish, then the connection to the worker is closed