Nolinear solver did not converge. Out of memory during LU factorization

Hello,

I am building a model using version 4.1, in which heat transfer driven melting of paraffin. Each time I compute, is solves at first and then the following error appears:

Nonlinear solver did not converge.
Out of memory during LU factorization
Last time step did not converge.

I have tried increasing the mesh density or changing the solver PARDISO to SPOOLES or MUMPS. but I keep getting the same error after some time. It takes longer to appear.

I would really appreciate any help.
Here attach file is my model, can you read my model and tell me what's wrong with the model?
Thank you very much.

XL Wang

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