Tried deleting the marriage and adding it back in but no luck
Could someone have a look if possible - when the gedcom is produced, the marriage isn't there?
Thank you
Dave
No Gedcom MARR tag for a marriage will be produced unless either the Family Relation is set to indicate a marriage or you create a Union for the Family. Without one or the other then only a FAM tag is generated.
Note that the horizontal line on a GenoMap joining two individuals does not in itself indicate a marriage, merely a family.
It is impossible to examine you particular case unless you send an example. If you are prepared to send me the .gno file then use the Send File dialog (http://www.genopro.com/help/send-file/) on GenoPro's File Menu when you have your example open in GenoPro. Just Send to my Username (Ron).