Bit value:  536870912

(Only applies under AMOS as C version always uses optimized mode.) In the normal AMOS mode, when a memo is updated, an entire new copy is written to the file first, then the old copy is deleted, and finally the first record of the memo is relocated to take over the original link position. If the file fills up or another error occurs during writing of the new copy, the original copy is preserved. However, the cost of this additional safety is greater fragmentation and a lot more disk I/O, especially for large memos. In the optimized mode, the new memo is written directly on top of the old one, adding to it or truncating as needed. This is much more efficient but does mean that you may end up with a partially written memo if the file filled up while writing it out.