./twigs.pl -xmlfile=a2b9f375-51fe-41a1-86ab-069561517890.xml
error in xpath expression substring(//OLifE/Party[@id=//OLifE/Relation[RelationRoleCode/@tc=8]/@RelatedObjectID]/Person/FirstName, 1, 30) around substring(//OLifE/Party[@id=//OLifE/Relation[RelationRoleCode/@tc=8]/@RelatedObjectID]/Person/FirstName, 1, 30) at ./twigs.pl line 7