** ERROR 2002024 ** Core-shift analysis is on without any constraints on the core. Add constraints or turn off core-shift option to run regular flow analysis.
The Perform core shift analysis option in Solver parameters is on, however the modeled core has not been constrained.
Select (Analysis > Set Constraints) and apply suitable constraints to the core, or turn off the core-shift option in the advanced options to run a regular Fill+Pack analysis.