".tch" file for QRC extraction of RC corners in MMMC.VIEW file.

Greetings of the day !

I have designed an SPI ( Serial Peripheral Interface) Module using TSMC65nm technology in Cadence Innovus. At last during the Sign-Off stage I am checking for Slack values (WNS/TNS) by clicking on the timing report. After the execution of this I'm getting an error saying "Extraction failed because *Quantus QRC* is not specified for all RC corners in MMMC file, this is mandatory for medium or high or signoff effortLevel postRoute extraction. If all files are unavailable, set 'setExtractRCMode -effortLevel low'. Ideally specify the technology file for each RC corner using the -qx_tech_file option of the create_rc_corner or update_rc_corner commands."

This error actually is due to the missing referencing to the ".tch" file in *MMMC.VIEW* " file, which is being loaded during design import in Innovus. I have searched for this .tch file everywhere in the TSMC 65nm technology bundle, but could not find it. However, for gpdks this .tch file is clearly available.

Kindly help me in knowing where this .tch file is accessed from for tsmc65nm technology or is it specified with some other name in the technology folder.

Thanks & regards,

Dr. Garima Shukla.