please tell me the solution of this error:
Netlist Error ... and run Analog Environment simulator, I get the error "can't find the date xxx/yyy/schematic was last extracted. none of the properties 'last schematic extraction' or 'sylast extraction' was found.
If you've already 'Check and Saved' your testbench schematic, try explicitly doing a hierarchical check'n'save to get everything in sync. In IC6.1.x it's the the 'Check - Hierarchy...' menu pick.