adding a label to a pretrained textcat

[mathiasdus]

Hello,

I know that since v3 of Spacy, textcatBow is resizable. Hence, adding a label to an already trained texcat_multilabel pipeline should not be a problem. However, when I call textcat.add_label(), I get the error:
[E922] Component 'textcat_multilabel' has been initialized with an output dimension of 30 - cannot add any more labels.

Why is this happening?

[adrianeboyd]

Resizing for textcat was added in v3.1.0. Can you check which version of spacy you're using (spacy info) and whether the textcat architectures in the config correspond to spacy.TextCatBOW.v2 or spacy.TextCatCNN.v2? If they're the v1 versions, you would need to retrain the model from scratch with the newer architectures in order to be able to add new labels.