What version of Visual COBOL are you using?
In the more recent versions of Visual COBOL it is not necessary to use the class repository. You could code as follows:
01 objLireTPrestInt type LireTPrestInt.
01 objTPrestInter type TPrestInter.
In your code:
set objLireTPrestInt to new LireTPrestInt.
set obj-lire-tprest-int to new objLireTPrestInt::getObject()