The worksheets build on each other with data written in one worksheet being used in the next. If the location of data being written is not consistent this breaks the workflow.
Worksheet 2 has
Save the new cube as a new netCDF file
OUTDIR = 'data_v2/EAS-22'
while worksheet 3 has:
Directory name where processed data is stored
HISTDIR = 'data_v2/EAS-22/historical'
this needs to be fixed