I keep getting " You are attempting to connect incompatible connectors. No couplings can be added automatically. To continue, change connector(s) or add couplings." warning. I click the pipe /show service/ select fitting/ insert part. This even happens if i attach to the end of a pipe. or if i draw a completely different pipe in that area, but it is only on a specific fabrication service. Any ideas on how i can correct this? Thanks in advance