Tom, The temporary code can be used for every AIM application. At least it could the last time I loaded it. So no matter what applications you have loaded, if you are forced to reload and get a new host id then your old licenses will not work. So you obtain the new (90 day license) from Invensys TAC and load that one code into every license required by the API Admin tool. With Windows machine you can even copy / paste. When you have the time to send in the form for your permanent licenses, you will receive (I think) different codes for your different packages. As long as someone remembers to install the permanent codes, before the 90 day expiry date (written in API Admin) you should not have any issues. Terry Doucet, Eng. Object : Re: [foxboro] AIM_AT Authorization Code Gotchas (Users Beware) _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave