This is a place to provide bug information on FLUENT. Please make sure that it is really a bug. Try and provide some indication of what circumstances the bug occured. Somethings work fine 99% of the time. If this is a limited circumstance issue, it is still a bug, but be clear when it can be expected to occur.
== Parallel Issues ==
Many features of Fluent do not work properlly in parallel. Some of these are trapped by the Cortex interface, some are not. Some of these are documented, some are not.
=== Merging Fluid Zones ===
When running in parallel merging fluid zones may result in an irrecoverable grid error. If you run a grid check you will find errors that the number of nodes found does not match the expected. This has been confirmed for a 21 million cell grid with some mixed cell type zones and some all hex zones. It is possible it may not occur under other circumstances.