Hi all, I was just reading the new SMUG book (which now seems to have disappeared from my desk...hot material!), and found a section that discussed how many extents a file can have. I wasn't willing to accept the "conjecture" made by the person they referenced (me) so I thought I'd do a test... I started a test program yesterday, that loops: fopen (file, append) (the file's reccord size is 4096 bytes) fwrite fclose (fid, %20, 0) (close, release extra space (if any), without changing the LIMIT) Each iteration allocates another extent. It's now about 24 hours later, and the file has 110,731 extents, and is continuing to grow (about 1 extent per second): A LISTFILE ,3 shows: FILE CODE : 0 FOPTIONS: BINARY,FIXED,NOCCTL,STD BLK FACTOR: 1 CREATOR : ** REC SIZE: 4096(BYTES) LOCKWORD: ** BLK SIZE: 4096(BYTES) SECURITY--READ : ANY EXT SIZE: 0(SECT) WRITE : ANY NUM REC: 110731 APPEND : ANY NUM SEC: 1771696 LOCK : ANY NUM EXT: 110731 EXECUTE : ANY ^^^^^^ Note: FFILEINFO item #44 incorrectly returns the bottom 16 bits of the number of extents and no error or warning. The book is available from Robelle Consulting Ltd, info at: http://www.robelle.com/smugbook/ Stan (no, the test machine didn't have anything better to do) Sieler