All of these indicate that either the dates are wrong, or the people are misidentified. Poor math can also result in the skipping of a generation.
To check for errors, you can use genealogical analysis programs like these:
- The Genealogica Grafica tool does thorough tests on GedCom consistency, like finding subsequent births within 9 months.
- The website Bonkers can identify groups of claims that are inconsistent with each other.
- Analyze is a command line program for displaying unconnected individuals in any GedCom file.
- GedCom View and Compare visualizes differences in the data of persons included in two GEDCOM files.
- The program GedCompare searches for possible double persons in a GedCom file.
- With GenMerge you can find possible double persons in a GedCom file and merge them, when needed.
- When submitting a GedCom file to the Ged-InLine website, a report is produced with warnings about deviations from strict GedCom.
- The GedCom Service Programs checks GedCom files for duplicate entries and logical errors and allows a merging of duplicate persons. Additionally, a selection of a GedCom file can be exported, when you want to share only part of your data with someone.
Een Nederlandse versie van deze pagina vind je op mijn Genealogie Bos Blog.