checks a /nbn/ object

Description

checks the consistency of nbn as a /nbn/ object issues a fatal error with some clues if inconsistent.

Usage

1
check8nbn(nbn)

Arguments

nbn

The nbn object to check.

Details

Looking a the code of this function provides a way to know which are the requirements of a /chain/ object.

Value

TRUE or a character containing some clue about the discovered inconsistency.

Examples

1
2
3

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