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### Sage crashes when inverting a large matrix - alternatives?

I'm trying to find the inverse of a 50x50 dense matrix of rational numbers. The matrix is created using the method matrix_from_rows from another matrix that was created using matrix(QQ,B) from a list of lists of rational numbers B. The error I get is the following:

/usr/.../sage-4.7.1/local/bin/sage-sage: line 301: 27416 Killed                  sage-cleaner &>/dev/null
/usr/.../sage-4.7.1/local/bin/sage-sage: line 301: 27417 Killed                  sage-ipython "\$@" -i


I'm doing this at the university, so the number of processors and RAM both seem to be infinite.

I wonder if there is an alternative. For example, I could try to invert the matrix in Mathematica or Maple. Is there an easy way to interface with them? Thank you!