Some models created in versions of Crystal Ball earlier than 7.0 might not run because they reference CB.xla instead of cbdevkit.xla in VBA. To fix this, in the VBA editor, set the reference to cbdevkit.xla (in the main Crystal Ball installation folder -- by default, C:\Program Files\Oracle\Crystal Ball) and uncheck the reference to CB.xla.
For Predictor, now shipping as part of Crystal Ball 11.1.x, the new file to reference is CBCOMDevKit.tlb. For information about necessary code changes, see the current Oracle Crystal Ball Developer's Guide.