Acompat.exe does work. The second error is apparently due to an unrelated issue.
Insufficient disk space is, from my googling, a very frequent problem, which is not related to installation.
Here are two previous posts.
The issue,as Footpad explains, is, in fact, not insufficient disk space but Paradox's/DBE's inability to read larger drives. The result is inability to any or all of the following: export, query, restructure or otherwise manipulate tables regardless of actual available space. There may be other issues in force such as cache size or Private folde location. These problems apparently won't exist if the files are located on a drive with less than 2 gb space, but a larger drive with less than 2 gb available space will not work.
This is entirely livable. I also increased the block size in BDE Administrator. I am I have reversed the "make changes permanent" option by restarting acompat.exe and unchecking all but checking "make changes permanent" to reopen Paradox, the closing again and reopening it with acompat.exe. This means that any time I wish to alter a data base, I need to use acompat.exe to open Paradox. fairly sure that this had no influence on the solution, however.
The "number out of bounds" error was resolved by exporting the original file "R.db" to "R1.db", which can be restructured without problem.
I have to add that it took me far too much work to unearth this answer. Obviously Microsoft is aware of the problem inasmuch as they provided a solution. Corel must be similarily informed, so why was no information regarding this simple solution to a very time consuming problem made available? Drives over 2gb were on the market long before Paradox 8 became a legacy product.