## Changes Introduced in V7.3.0

The following describes the most significant changes which occurred in the AST library between versions V7.2.0 and V7.3.0:

1. The interface for the astRebinSeq<X> family of functions has been changed in order to allow a greater number of pixels to be pasted into the output array. The "nused" parameter is now a pointer to a "int64_t" variable, instead of an "int". APPLICATION CODE SHOULD BE CHANGED ACCORDINGLY TO AVOID SEGMENTATION FAULTS AND OTHER ERRATIC BEHAVIOUR.

2. Added a new facility to the FrameSetFrameSet class to allow each FrameFrame to be associated with multiple Mappings, any one of which can be used to connect the Frame to the other Frames in the FrameSet. The choice of which MappingMapping to use is controlled by the new “VariantVariant” attribute of the FrameSet class.

3. Mappings (but not Frames) that have a value set for their IdentIdent attribute are now left unchanged by the c astSimplifyastSimplify function. f AST_SIMPLIFY routine.