Delphi32.com 에서 펐습니다.
대충 보시면 이해가 되실거예요.
그리고 밑에서 먼저 읽어 보라는
www.borland.com/devsupport/bde/ti_list/TI275 .html
여기 대신에 여길 보세요.
http://www.borland.com/devsupport/sqllinks/pub-88.html

그럼 수고하세요.
아참. 그리고
BDE > Configuration > System > INIT 설정을 바꾸고 나서
재부팅하셔야 될겁니다.


Whenever I attempt to open many query or table cursors, I finally reach a point when I get an error, "Insufficient memory for this operation". What do I do?    


First, you should read the technical document at www.borland.com/devsupport/bde/ti_list/TI275 .html Some current internal limits of BDE. This document will tell you what most of absolute BDE limits are. IMPORTANT: If your application is not reaching one of the limits covered there and you are also getting the above error message, most likely the SHAREDMEMSIZE setting in the BDE will solve your problem. This setting will allow you to increase the BDE's internal object memory pool. A setting between 4096 and 8092 should be more than plenty.

사용한 폼을 메모리에서 지웠는지 확인해보세요
폼 Close할때 OnClose 이벤트에 Action = caFree를 쓰면 그런 문제가 조금은 없어질듯 하네요

즐코하세요