April 2026 critical fixes
April 2026 fixes were published on 21 April 2026. All critical fixes listed here were fixed for versions 2606.0, 2512.5, and 2506.9 unless otherwise noted.
Bug 113674: Incorrect thermal coupling connections with projective intersection method
Fixed version: 2606.0
A thermal coupling defined using the projective intersection method could generate incorrect thermal connections due to an issue in the octree search algorithm. Instead of linking nearby elements, the method could occasionally connect elements that are geometrically distant or located on opposite sides of the geometry.
While the behavior is not random, it may appear unpredictable from a user perspective. The issue typically arises when valid nearby elements exist in the projection direction, but additional elements are also present further along that same direction, the element normal. In such cases, the algorithm may incorrectly select a farther element instead of the closest one.
This issue has been resolved in both the user interface and the solver.
User Story 122208: Enhance plane stress edge modeling for enclosure radiation using Monte Carlo to support mixed 2D/3D configurations, namely cyclic symmetric 3D free faces, plane stress free edges, and internal edges between plane stress and axisymmetric elements
This enhancement improves the accuracy and robustness of enclosure radiation calculations using the Monte Carlo method for models that combine 2D plane stress and 3D cyclic symmetry representations.
Previously, applying radiation to free or internal edges of plane stress elements in such mixed configurations could lead to reduced temperature prediction accuracy due to limitations in plane stress edge modeling.