How to do a frequency analysis of multiple components in Catia?

Tried to do a frequency analysis of a cantilever with multiple components attached at the free end in Catia V5, however after I click on the Compute "All", it saying that:

Factorized matrix computation.
Singularity detected in translation (pivot too small)
Possible reasons: missing restraint or connection specifications.
Display deformation or displacement vectors to diagnostic the problem.

The assembly diagram is attached (the cantilever beam is coloured in red). When I check at the deformation (run.png), I can see that the deformation happen at other component but not the cantilever beam.

Can anyone help??

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