A problem with GED-GEN was reported when using GEDCOM files downloaded from geni.com. When you export a GEDCOM file from geni.com, the file may not include all required family records.
Normally a GEDCOM file is “self-contained.” That is, if a family record is referenced within the file, that family record should also exist within the same file. In many cases I found that a record for an individual referenced other spousal family records. However those family records were not included in the same GEDCOM file.
Although GED-GEN performs extensive error checking, the unexpected absence of the whole family record causes a problem. This error condition will be corrected in the next release of GED-GEN.
As a temporary work-around to this problem, if you export a GEDCOM file from geni.com, please import that file into your genealogy software program as a new, temporary database. Then export a new GEDCOM file from your genealogy program, which should produce a valid GEDCOM file. Finally, run GED-GEN using the valid GEDCOM.