Details
Can't Pack and Unpack a BOM in Structure manager, when an NX assembly with child components having multiple instances is uploaded using tcin_import utility.
Solution
Use TC Preference (PS_new_seqno_mode=existing), this will generate sequence numbers that help in Pack and Unpack operation.
Notes and References
IR 9824848
Hardware/Software Configuration
Platform: INTL64
OS: windows
OS Version: 10_1909
Product: NX
Application: NXMANAGER
Version: V1899
Function: ASSEMBLY
Ref: 002-8523053