How to make my CGNS solutions to be read by fluent
 

How to make my CGNS file with flow solution fields to be read by fluent. I write a code to read CGNS files with flow solution fields, if the flow field has a small number of grids, it's all OK, I can use fluent to see the solutions, but if with a bigger number of grids,then fluent can not deal with it, if a CGNS file with solutions is imported to fluent, fluent exit automatically, why? Please help me! if anybody wants, I can give my code to discuss!