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FAQ

The installation fails with the error "cannot find -luuid"

This is generally a MathLink issue (not specific to FiniteFlow) on some Linux distributions. It can be solved by installing the uuid-dev package or an equivalent one, depending on the distribution.

A procedure fails, saying the arguments are not polynomials or rational functions

When passing rational functions to dataflow procedures, they should be collected under a common denominator, i.e. written as ratios of two polynomials. This is also true for the coefficients multiplying the unknowns of linear systems, where one can use the option "ApplyFunction" to fix the issue. As an example, this will cause an error

  FFDenseSolve[{(t + 1/t) x + y == 3}, {x,y}]

because the coefficient of x is not written as a ratio of two polynomials. However the following works

  FFDenseSolve[{(t + 1/t) x + y == 3}, {x,y}, "ApplyFunction"->Together]

and is equivalent to

  FFDenseSolve[{Together[t + 1/t] x + y == 3}, {x,y}]

The definition of a node in a graph returns $Failed

This can happen because of multiple reasons, but it is often due to the fact that the expected numbers of inputs of the new node, or their length, is incompatible with the selected input nodes.