I have some applications running in Foxpro 2.5 for DOS, and working fine. In the extended mode.
Sometimes, (rarely) when the application start to print some report, the printing is so slowly that we can't wait (using a Epson LX-300), some like 1 line at each 20 seconds, and in the draft mode.
If we exit the application and restart the computer (DOS 6.22), the application print normaly again.
In other cases the query that return 1 record in 1 or less, some times (like the printing) begin to delay 20 to 30 seconds to return the same 1 record. We again have to quit the application and start again.