Raises exception when unable to load data

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Coverage Report

File	Stmts	Miss	Cover	Missing
mlops
Experiment.py	152	30	80%	46–51, 71, 78–79, 96, 98, 103, 173–187, 205, 207–208, 253–254, 262–265, 269–270, 277–278
ProjectFile.py	22	1	95%	38
cli.py	18	18	0%	1–50
mlops/data/tools
tools.py	47	41	13%	16–88
mlops/data/transforms
LoadImageXNATd.py	43	32	26%	21–25, 47–97
TOTAL	309	122	61%

Tests	Skipped	Failures	Errors	Time
14	2 :zzz:	0 :x:	0 :fire:	35.449s :stopwatch: