Help! Can't start isql as non-root user.

Ok. We've been using INFORMIX-SE and INFORMIX-SQL 4.00.UE1 for Interactive 86/ix ("INTER./IX 386 2.2" is the label on the disk), but we're now going to Solaris x86 2.4. I've installed the SE and SQL software on our Solaris x86 system, and it seems to work fine as root, but I get the following error when starting isql as a non-root user: INFORMIX-SQL Version 4.00.UE1 Copyright (C) 1984-1989 Informix Software, Inc. All Rights Reserved Software Serial Number LEX#F172380 350: Index already exists on column. And then the program exits. What index? What column? Is it trying to create an index on a data dictionary table (or whatever informix calls that)? Any ideas? I thought it might be a permissions problem somewhere, but the install programs set ownership and group permissions identical to our 386/ix system. How can I troubleshoot this? Sorry, I'm a bit new to Informix. I'm used to working with Oracle 7 (no flames please). Thanks in advance. -Mike bendi003@maroon.tc.umn.edu