Hi, I have been trying to install rrdtools 1.2.13 on AIX 5.3 - without success. Can you tell us how you did manage to install rrdtools with IBM's C compiler? Regards Carsten Bech -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.441 / Virus Database: 268.18.3/698 - Release Date: 23-02-2007 04:39