The worker does not stop when errors are raised during a bulk run

[DanicaSTFC]

When runing a bulk run, this error occurs

iDVC/src/idvc/dvc_interface.py

Line 3550 in 4544c13

raise ValueError('No points in pointcloud')

When these errors are raised the worker should stop but instead the whole app freezes. The terminal has the following error:

No points in pointcloud

To replicate this bug:

The height of the mask can be +-500 planes, but it does not matter.
Set few points in "Points in run" e.g. 100

An example of bulk parameters:

Proposed solution

A new pointcloud is created for each subvolume size

iDVC/src/idvc/dvc_interface.py

Line 4685 in 6b71e63

if not self.createPointCloud(filename=filename, subvol_size=int(pc_subvol_size),

iDVC/src/idvc/dvc_interface.py

Line 3320 in 4544c13

def createPointCloud(self, **kwargs):

It seems that sometimes the points are set to 0 in

https://github.com/TomographicImaging/CILViewer/blob/076cfb9381425ab225c8c6fc64a5332940c63977/Wrappers/Python/ccpi/viewer/utils/visualisation_pipeline.py#L256

As a temporary fix, the worker should be stopped and raise a warning rather than freeze

Some more info on pointcloud in #90