wav2letter model not running on flashlight

[samin9796]

I trained an ASR model using the wav2letter toolkit and now trying to decode using flashlight. However, I am getting the following error:

E0615 18:37:35.549235 47040 Serializer.h:80 Error while loading "/home/eusl/Desktop/shared_mount/SAMIN/wav2letter/all_models/clean_subakko_model/001_model_clean_subakko_val.lst.bin": Trying to load an unregistered polymorphic type (w2l::ConnectionistTemporalClassificationCriterion).
Make sure your type is registered with CEREAL_REGISTER_TYPE and that the archive you are using was included (and registered with CEREAL_REGISTER_ARCHIVE) prior to calling CEREAL_REGISTER_TYPE.
If your type is already registered and you still see this error, you may need to use CEREAL_REGISTER_DYNAMIC_INIT.

terminate called after throwing an instance of 'cereal::Exception'
  what():  Trying to load an unregistered polymorphic type (w2l::ConnectionistTemporalClassificationCriterion).
Make sure your type is registered with CEREAL_REGISTER_TYPE and that the archive you are using was included (and registered with CEREAL_REGISTER_ARCHIVE) prior to calling CEREAL_REGISTER_TYPE.
If your type is already registered and you still see this error, you may need to use CEREAL_REGISTER_DYNAMIC_INIT.

How to solve the issue?

[tlikhomanenko]

what versions of w2l and fl are you using? When we moved w2l codebase into fl the namespacing of some blocks were changed so you need to convert models into correct namespacing now to be able to decode with new versions of fl.

See #524 for model convertor.

[ggsddu7]

@tlikhomanenko #524 can't build;
there is a w2l 0.2 ==> 0.3x solution now?