The reciepient system does not read the entity or read it wrong. In some cases, such a system will not recover many data from a file. The systematic B-spline usage in some system will give insufficient results for a reciepient system only using Bezier surfaces. Some files are too big. There are too many surfaces or and their sizes are too big in term of number of poles.
Adapter reduces the size and the complexity.
The IGES to IGES Adapter output file will be entirely corrected and also will be fitting to the reciepient system. Specific encoding contournement. Conversion of B-spline surface to Bezier surface. Conversion of elementairy surface to Bezier surface. File split in several parts.