If there are any untyped use links (only U . For more information on these links refer to ENL - Links) then the computed type will be ILF by default
If you are in a CAST AIP version >= 8.2.x then check if you have changed the default datafunction type explicitly - Global Computation Settings Calibrate > Computation Settings → Global Computation Settings Figure 2 Configuration at Application level Right click the Application → Computation Settings Figure 3 If 'Use Global Computation Settings' option is checked then the datafunction default Type at application level will be same as at global level i.e. the datafuncton default type set at application level will be ignored.
If yes then this is expected behavior else go to next step