This is a problem because of the python enviroment you are using. Change the target directory to the exact location instead of a relative path as in the example. For example: "YOUR_PATH_TO_MODELS_FOLDER/models/weights-improvement-{epoch:02d}-{val_acc:2f}.hdf5"

[NickRusso-os]

This is a problem because of the python enviroment you are using. Change the target directory to the exact location instead of a relative path as in the example. For example: "YOUR_PATH_TO_MODELS_FOLDER/models/weights-improvement-{epoch:02d}-{val_acc:2f}.hdf5"

Just go the the folder and check for properties by right clicking and copy the path you see over there to this line.

Originally posted by @cderinbogaz in #11 (comment)

Hello, I added my directory as you specified and still receive the same error

[chrishsr]

same issue, no clue how to solve it. i printed the format string, and it just says"../models/weights-improvement-{epoch:02d}-{val_acc:.2f}.hdf5" so it doesn't format the string properly

[moozgoos]

I am using something like this

metric = 'acc'
target_dir = "../models/weights-improvement/"
if not os.path.exists(target_dir):
os.mkdir(target_dir)
model.save('../models/model')
model.save_weights('../models/weights')

checkpoint = ModelCheckpoint(filepath=target_dir + 'weights-improvement-{epoch:02d}-{acc:.2f}.hdf5', monitor=metric,
verbose=2, save_best_only=True, mode='max')

and it works fine in Windows 10.

[tomitan100]

I am using something like this

metric = 'acc'
target_dir = "../models/weights-improvement/"
if not os.path.exists(target_dir):
os.mkdir(target_dir)
model.save('../models/model')
model.save_weights('../models/weights')

checkpoint = ModelCheckpoint(filepath=target_dir + 'weights-improvement-{epoch:02d}-{acc:.2f}.hdf5', monitor=metric,
verbose=2, save_best_only=True, mode='max')

and it works fine in Windows 10.

Unless you already have "models" directory, best to use os.makedirs(target_dir)