Hello Hooked,
When working with UNC files there are 2 main things to take in consideration:
- Explicitly opening for SMB communication
RPC EPM TCP 135 - 139
RPC over HTTPS TCP 593
SMB (for named pipes) TCP 445 - Resilience of network
When the error happens, you may try to "clean" the network usage, in order to confirm if there is any local bottleneck of the computer: Run>
ipconfig /flushdns
nbtstat –RR
netsh int ip reset
netsh winsock reset
Hope this helps in your case,
Best regards,