When initially deploying my SSIS package to my pre-production environment I got a bit hooked up on the following warning message which was appearing despite calling my package via DTExec with /conf = C:\Configuration.dtsConfig


Warning: 2006-08-21 10:58:19.96
  Code: 0x80012014
  Source: export process
  Description: The configuration file "D:\Configuration.dtsConfig" cannot be found. Check the directory and file name.
End Warning
Warning: 2006-08-21 10:58:19.96
  Code: 0x80012059
  Source: export process
  Description: Failed to load at least one of the configuration entries for the package. Check configurations entries and previous warnings to see descriptions of which configuration failed.
End Warning

I managed to reproduce this on my development machine by renaming D:\Configuration.dtsConfig to .dtsConfigx and running the package. It seems that SSIS checks for the configuration in the location it was originally created before processing the /conf override. Once I'd sorted this out I could concentrate on the real errors :-)