Convert Tensorflow model to CoreML for iOS app

I’m trying to convert my tensorflow image classification model to a CoreML model that I can integrate in an iOS app. The tensorflow model takes in an image of shape (1,28,28,1) and outputs a softmax array. When I try to convert it to CoreML I get the following error:

raise TypeError(“Unsupported numpy type: %s” % (nptype))

TypeError: Unsupported numpy type: float32

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Does anyone have any experience with this?