"AttributeError" while drawing model

[icyblade]

Such error will be raised when trying to draw model with protobuf>2.6.1 (for instance protobuf 3.2.0):

AttributeError: 'google.protobuf.pyext._message.RepeatedScalarConta' object has no attribute '_values'

There's an issue from original caffe which shows how to solve this problem: BVLC#3698

[lukeyeager]

Could be fixed by locking the protobuf version like so:
https://github.com/NVIDIA/DIGITS/blob/v5.0.0/requirements.txt#L4

Instead of the current open requirement:
https://github.com/NVIDIA/caffe/blob/v0.15.14/python/requirements.txt#L13

[icyblade]

I do think that supporting newer version of protobuf is necessary, as we can't stick on older version forever, right?

[lukeyeager]

I think that's debatable. Fixing dependencies to versions supported by the Ubuntu LTS versions gives nice stability.

However, at least DIGITS is clear in it's expectations. This repo should probably be either updated to allow the newer version or the restriction should be marked clearly in requirements.txt.

[icyblade]

Well, you're a persuasive guy. I didn't consider system support before.