Once I had finished my VB-application I started to distibute it by making the setup disks using the 'Application Setup Wizard' . The first time these disks produced a pretty good costumer application (all target systems run under Windows NT 4.0 using ODBC - 2.1.. with database on a SQL Server, the reports are generated by Crystal Reports 5.0 ). And now the problem: On some PCs the setup didn't run well, because a error occurs in the last phase of the setup process. Setup is unable to register the CRYSTL16.OCX control and will not end correctly (NT was just new installed on the target machines). Do you known about difficulties like that ? and how to avoid the registration error ?