Help algorithm failde at iteration

[Oreste]

I have a plane model of a beam made with quad elements (Plane Stress), I have 8346 items.
The analysis package is as follows:
# Define analysis parameters
integrator LoadControl 0.1 1 0.1 0.1
system SparseGeneral -piv
test NormDispIncr 1.0e-5 100 1
numberer Plain
constraints Transformation
algorithm KrylovNewton
analysis Static

# Apply the 1 points in the files.
analyze 1

When I launch opensees me the following error:

Help algorithm failde at iteration, 0 with domain at load factor 1

Can anyone help gently

[fmk]

make sure you have enough constraints in the model .. try a different solver, e.g. Umfpack or SparseSPD to see if it spits out an error.