> not trusting datasheet sample code I checked my drives for old projects and found one for an 18F452 which I now remember copies 6 pages of RAM to Flash. The erase routine is within a loop to erase 24 blocks for writing 5FF of RAM Comparing it with the 452 datasheet I see that back then I knew to add a tblrd*- because the 452 d/s has it. The 1320 example is not a complete copy/paste of examples in older datasheets or for some other reason does not include the tblrd*- The 452 code still works and is functionally identical to what doesn't work in this 1320. I'm going to try a 14K22 or 2520 instead and if that's OK give using the 1320 for this project a miss Joe ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2016.0.7797 / Virus Database: 4656/13179 - Release Date: 10/09/16 --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .