Behold will help you find many different types of problems with your data file:
Non-Standard GEDCOM and Data Problems: There may be something wrong in the GEDCOM file, or your data itself may have some problems. This includes logical problems, known as Consistency or Sanity checks. Behold finds many of these problems for you. Here is a listing of everything Behold checks for.
Ancestor Loops: Behold is one of the only programs that can find ancestor loops (where a person is their own ancestor) and let you know about them in a way that will allow you to correct the problem. An example of an ancestor loop message is:
Notice that the individual ID numbers are listed so that you can tell the people apart and try to figure out which parent/child connection is incorrect.
Unconnected People: After selecting the person of interest, the "Everyone Else" section are the unconnected families, and the completely "Unconnected Individuals" are given their own special place among the Everyone Else. You may see families or people here that should be connected, so now that you know about them, you'll be able to correct them as they should have been.
Duplicated People: Sometimes, especially if you've used some program to merge multiple data files together (highly NOT recommended), your file may end up with duplicate entries for the same person. To find those, go to the name index. Scan through the index looking for two people, one after another, with identical or near-identical names. They could be people that are repeated. The birth and death dates after the people will be additional help. Behold will make it easy for you to go back to their data and see if they are the same. e.g.:
In the above example, the two Heinrich Richard Niefts are probably different people, but the two Heinz Richard Nieft are probably the same and may also be the same as the Heinz Nieft.
Unreferences Sources, Repositories, Notes or Objects: Behold will list all references to any sources, repositories, notes or objects. It will indicate those that are unreferenced. This may be okay if you entered one of these items just to remember it, but these usually are referenced from individuals, families, or events within them. Behold helps you identify these.
Inconsistencies: These are slight differences in the spelling and use of surnames, placenames, and source references. You can find these by scanning through the Name Index, Place Index, and Source Index. They will pop right out at you.