In Studio 6.0 if a data file is created where an allocation override rule places the file in a specific directory and that directory is described by an environment variable, the variable was placed into the PCDSN of the catalog record. The variable is expanded and that expanded value is stored in the PCDSN. We rely on this behavior to make files portable by simply changing the value of the variable to relocate files. This is often done when performance dictates that the file should be moved to another file system and removes the need to re-catalog files. This is no longer working in Enterprise Developer VS 2010.

In Enterprise Developer VS 2010 you must now use both ES_ALLOC_EXPAND=N and ES_ALLOC_OVERRIDE.