Product and version: FileMaker Pro Advanced 18.104.22.1685
OS and version: Windows 10.0.14393
Description: Filemaker Pro Advanced 15 includes, and requires, xerces-c_3_0.dll (version 3.0.1), which has security vulnerabilities: see Security Advisories
So it appears the xerces 3.1.4 interface is incompatible with FileMaker 15. We have users who will not use software with any vulnerabilities whatsoever.