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c++eigen

Eigen Assertion error at run time

I am compiling a program that uses several Eigen::MatrixXd methods, and while I get no errors when compiling it, running it I get the following error:

darwin-pi2: /usr/include/Eigen/src/Core/Assign.h:498: Derived& Eigen::DenseBase<Derived>::lazyAssign(const Eigen::DenseBase<OtherDerived>&) [with OtherDerived = Eigen::Matrix<double, -1, -1>; Derived = Eigen::Matrix<double, 15, 15, 0, 15, 15>]: Assertion `rows() == other.rows() && cols() == other.cols()' failed.

I guess it is something related to Eigen matrices, but I do not understand what Assertion rows() == other.rows() && cols() == other.cols()' failed means.

Solution

  • Because Eigen::MatrixXd has dimensions determined at runtime, the compile-time size checks are all disabled and deferred until runtime.

    In this case, it looks like you're assigning from a dynamic-size matrix to a 15x15 one. Try double-checking and debugging the size of that dynamic one.