Issue:
I ran an analysis, and this error came up: “Error in solving the linear system of equations. Number of degrees of freedom in LHS and RHS aren’t equal”Applies to:
- Simulation
- Topology Optimization
Cause:
The cause for this issue is typically due to an error in a boundary condition or a constraint block.Solution:
-
- Adjust the the tolerances for each boundary condition and ensure they all make sense and work?
- The nodes might be part of dependent nodes of a Tie Constraint (that theoretically will have to follow the independent nodes),
- Make sure the constraint and restraint blocks are used correctly in Topology Optimizations
- Ensure that there are no same nodes in a Displacement Restraint (that theoretically will be fixed (if the value is 0) or have a Prescribed Displacement (if the value is non-zero))