receive a "Fatal Error" every time I try and add a part into an assembly
NX 11 | SW 2016 | Creo 4 | TcUA 11.4
Evaluating: AW 3.4
Reproduce the error and upload your NX syslog (Menu > Help > Log File) - you'll also find a copy in your temp directory. You may have to set UGII_KEEP_SYSTEM_LOG=1 if the fatal error crashes the session and does not leave a syslog behind.