Unfortunately, it appears that you will need to contact tech support (http://support.installshield.com/contact/) on this issue. They will have better channel to gather help for you.
You may need to provide the version of AS you are running, database used for conflict resolution, the error message (screenshot), and other things to tech support.
I've gotten the exact same message from Conflict Solver, unfortunately I haven't found a solution either. Just letting you know you are not alone and that if I find out the solution I will reply again.
I am using the Adminstudio 7 Conflict solver for my applications. I got the same kind of message in the output window, when i tried to run the conflict solver for any application.
ACE07 : Failure : Microsoft ODBC Microsoft Access Driver not enough Space on Tempory Disk. File : C:\Adminstudio\current\source\ConflictSolver\iscrm\ISCMutils.cpp Line : 258
This Error appears only for ACE07 Rule.
But if i use the default "sample.mdb" file which is available in c:\Adminstudio shared\ , Every thing work fine. I am Using MS Access for the Application repository. I can't find the reason why it happened.Please help me on this issue.