The simulation environment (si.env) file is read in from the simulation run directory. It can be created manually or by using the CDL Out form in the run directory. This file is used to instruct simulation environment (SE) which design to simulate and which simulator to use. In addition to the default information SE stores in this file, you can instruct SE to save any application-specific variables by using the variable simSimulatorSaveVars. The file is overwritten by the SE function simPrintEnvironment each time a simulation is run, and any other information stored in this file that SE has not been informed of is lost. The si.env file is used to communicate environment information between SE and the Cadence graphics program.
The .simrc control file, which can be searched using the CSF mechanism, always overwrites the values in the si.env file.