It seems that the only way to convert CATIA export files (*.dlv) to CATIA v4 models (*.model) is to either use CATIA software itself or some dedicated CAD conversion software like the CrossManager. Other than that, no other solution is known to us at the moment.
Convert CATIA export file to CATIA V4 model file.
We have found 2 software records in our database eligible for .dlv to .model file format conversion.
Microsoft Windows software - convert dlv to model on Windows
A PLM/CAD/CAM/CAE software suite
Convert from dlv file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned dlv to model. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
A CAD converter with huge format support