Hi Zito,
2026-02-20 21:31:49,283 - ERROR - [JobQueueWorker [3]] UM.JobQueue.run [135]: line_types = numpy.fromstring(polygon.line_type, dtype = "u1") # Convert bytearray to numpy array 2026-02-20 21:31:49,283 - ERROR - [JobQueueWorker [3]] UM.JobQueue.run [135]: ValueError: The binary mode of fromstring is removed, use frombuffer instead
Upstream still has this line of code [1], so I suppose we'll need to fix it ourselves. The deprecation happened in numpy 1.14, according to [2], but it hadn't generated ValueErrors up until 2.3.0 (see release notes [3]). Can you confirm that this is really the same bug as reported by Arcademan? If not, please file a separate bug report. I'll forward the issue upstream and try to prepare a fix. Thanks! [1] https://github.com/Ultimaker/Cura/blob/main/plugins/CuraEngineBackend/ProcessSlicedLayersJob.py#L143 [2] https://numpy.org/doc/stable/reference/generated/numpy.fromstring.html [3] https://numpy.org/doc/stable/release/2.3.0-notes.html#expired-deprecations
