The outer lines of countersink holes are missing in a DXF file exported Flat Pattern
Solution
Please check in the "Save as Flat" Options the Layer Tab if in the column SE Features the "Complex Hole" is activated for the "Export to DXF".
This is need to get the Countersink holes completely translated.
For more details please see our online documentation:
http://docs.plm.automation.siemens.com/tdoc/se/2019/se_help/#uid:saveasflat4d Notes and References
Hardware/Software Configuration
Platform: INTL64
OS: window
OS Version: 1064
Product: SOLID_EDGE
Application: PART/SHEETMETAL
Version: V219.0
Function: SAVE_AS_FLAT
Ref: 001-9498556