Hi, I would like some help on this issue please. We are running UniVerse 188.8.131.52 under AIX 5.1.0 ML 5. Does anyone have experience/knowledge /opinions about the effects of switching the 64bit option in the UVCONFIG file, from its current value of 0 (32bit, max file size 2Gb) to 1 (64bit >2Gb)? How will that impact the running of UniVerse eg Resize etc. and existing files which were created under the 32bit limit? Any feedback on the subject will be welcome. Thanks.