ERROR (OSSHNL-109)

Hi,

No matter how many times I check and save, every time I try to generate the netlinst I get the below error. Please help me solve this.  Cadence Virtuoso version: IC6.1.6.500.1

ERROR (OSSHNL-109): The cell view, 'XXXXX_tb/schematic', has been modified since the last extraction.
Re-extract the design (File->Check and Save menu option) for schematic cell views to correct this error.

Thanks