RDELE, NSET1, NSET2, NINC, LCHK
Deletes real constant sets. 
NSET1, NSET2, NINCDelete real constant sets from NSET1 to NSET2 (defaults to NSET1) in steps of NINC (defaults to 1).  If NSET1 = ALL, ignore NSET2 and NINC and all real constant sets are
deleted.
LCHKSpecifies the level of element-associativity checking:
NOCHECK  | —  | No element-associativity check occurs. This option is the default.  | 
WARN  | —  | When a section, material, or real constant is associated with an element, ANSYS issues a message warning that the necessary entity has been deleted.  | 
CHECK  | —  | The command terminates, and no section, material, or real constant is deleted if it is associated with an element.  |