Buckling using ASET method in Femap

[nuraen]

Need help setting up Buckling using ASET method in Femap.
I got a FATAL after an attempt at running a model.
I ran a static model, modified the .DAT file for buckling, added statsubs and method to all the subcases; added the EIGRL card, created a new constraint group (fixing all 6dofs) and used the group to create ASET bdf. Is fixing the 6dof appropriate? If yes, what could be source of the singularity FATAL I am getting?

 

[TG_eng]

What version of Femap are you using? Support for STATSUB was added in Femap 2019.1

 

[estring1]

ASET GRIDs should have all 6DOF constrained. You also need to include an SPC in addition to the ASET. See below for an example case control:

SUBCASE 1

SUBTITLE = STATIC_RUN​

SPC = 1​

LOAD = 1​

SUBCASE 2

SUBTITLE = BUCKLING​

SPC = 1​

STATSUB = 1 (static subcase)​

METHOD = 1 (EIGRL METHOD ID)​

BEGIN BULK
ASET 1 123456
ASET 2 123456
ASET 3 123456
ASET 4 123456
...