Fail to export pdf using ghostscript

Hi 

Im using Orcad 17.2 and the script used for exporting schematic pdf's is Ghost script gswin64c.exe. But Now i'm getting an error while exporting pdf which is,

ERROR: undefined

OFFENDING COMMAND: G2UBegin
STACK:
/Font
/TT15Ct00

Converter arguments : -sDEVICE=pdfwrite -sOutputFile=$::capPdfUtil::mPdfFilePath -dBATCH -dNOPAUSE $::capPdfUtil::mPSFilePath

Could you please help me to resolve this?