Lattice Radiant: Why do Radiant constraint editors remove customer variables and equations in PDC (constraints) file?

Lattice Radiant: Why do Radiant constraint editors remove customer variables and equations in PDC (constraints) file?

TCL commands and Constraint Commands cannot be joint on to the same constraint file. The Timing and Physical constraints found in constraint file (.pdc) are the only object accepted and read by the tool. The TCL commands for setting certain variables must be moved to TCL.