I/O Options and Subcase Information Entry The SET and PSET commands can be used in the I/O Options or Subcase Information section input deck to define sets of grids, elements, properties, or frequencies.


Data Description
SET n = i1, i2, ..., in Integer sets are used for sets of grids, elements, modes, and design variables.
SET n = r1, r2, ..., rn Real value sets are used for frequencies or times.
SET n = i1, c1, i2, c2, ..., in, cn Sets of Grid/Component pairs are used for PFMODE data.

Example: SET 24 = 12, T1, 15, R2, 128, T3

(alternatively 12/T1, 15/R2, 128/T3 is acceptable, see I/O Options and Subcase Information Entries Guidelines).

PSET n = PID1, PID2, ..., PIDn Property identification numbers are used for property set definition.


  1. Every SET must have a unique identification number, n, regardless of whether the SET is defined within a subcase or in the I/O Options section. Also, a SET cannot have the same ID as a PSET or the Bulk Data Entries SET, SET1, or SURF.
  2. From 10.0 onwards, it is recommended to use the SET Bulk Data Entry for set definitions.