Arbortext Editor creates a cache directory the first time you format a document. If the APTCACHE environment variable is set and the directory exists, Arbortext Editor will use that directory. Otherwise, Arbortext Editor uses (creating if necessary) a \.aptcache directory in the application data directory (as returned by the get_appdata_dir ACL function). The default directory is typically C:\Documents and Settings\username\Local Settings\Application Data\PTC\Arbortext\Editor\.aptcache.

The amount of disk space used when you format and output a document depends on the size of the document being output. Several files are created when you output a document, and some of these files can be quite large. Arbortext Editor stores the files generated by the most recent formatting of a document. When a document is reformatted, any existing files are overwritten with the most current information. Some output files are fixed in size, but there are several factors that can cause large files to be generated and stored. The largest files are usually of these types:

Once a document is no longer active, you can delete its associated formatting files from the cache directory using the clean_cache or doc_clean_cache commands.