Error in PDOS analysis in Material Studio CASTEP

Dear All,
I am getting following error in partial density of states (PDOS) analysis using CASTEP (material studio interface),

View DOS in CASTEP Analysis
Gaussian Smearing calculation failed

I have used OTFG-Ultrsoft Pseudo-potentials and there are no error messages in my calculation. What are the possible causes and what is the solution?

with many thanks and best regards
Soumyadeep
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Soumyadeep Ghosh,
Senior Research Fellow,
Homi Bhabha National Institute (HBNI),
Raja Ramanna Centre for Advanced Technology, Indore, India-452013
Mob: (+91)9424664553
User Lab: 0731244-2580
Email: soumyadeepghosh35@gmail.com, soumyadeep@rrcat.gov.in
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