Single User License Limit "exceeded"

Platform: HP-9000 E35 (HP/UX 9.04) Informix Versions: Informix SE 5.02.UC1 Informix R4GL/RDS 4.11.UC3 I have the above mentioned system configuration. I have a single user license. The problem I have is... I changed the name of a login user who did ALL the informix development for our company. Now, when attempting to compile CERTAIN modules, I get the error message that the "Single user license has been exceeded.". However, when I change the user name BACK to what it was, it is fine. This user is NOT logged in and is NOT using the Informix products. Is this a bug? Is there a file or something that stores the active informix users at the time? This was I could simply change the name. It is annoying to have to keep the old user name, because it is the only user name that can use the compiler.