Issues with LeTeX & plotting files

Hi there,
I'm running chains `> python montepython/MontePython.py info bao_hst/ --no-mean
` 
but having issue with generating plot files (LaTeX issue) as follows:
`FileNotFoundError: [Errno 2] No such file or directory: 'latex'
`
`RuntimeError: Failed to process string with tex because latex could not be found
`
Any help?
Thanks.