The EXT_APP_FILTER option is useful for automatically exporting results for use in other programs. However, the results are exported as DBF files with an identically named MDX file (for example, JUNCTOUT.DBF and JUNCTOUT.MDX). The presence of the MDX files causes errors when attempting to use the DBFs in MS Access or PowerBI. The only way to import the results into Access or PowerBI is to first delete the MDX files.
As far as I can tell, the MDX files serve no purpose; they are just an index. I suggest either (1) don't create the MDX files, or (2) export the results in a more modern file format, such as CSV.
