The 'DataDictionaryExporter.exe' program file must exist in the \softrak\system directory and it cannot be saved anywhere else. Is this where you have placed the file? If not then try copying it there and try loading it again.
To convert GridView views based on AR8 data to use the AR9 dicationary, you need to open each view (ignoring error messages) using GridView 90A. Then open the view definition (press F4), and re-select the table (Receivables 90A). Then GridView will walk you through the rest of the conversion.
There is a tech note in the Partner area of the website with instructions on how to convert GridView views to be based on Receivables 90A data.
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Regards,
Softrak Tech Support