Why does Simulink crash when I try to add a connection that already exists in SimPowerSystems?

If I have an "AC Voltage Source" and a "Parallel RLC Branch" in a model, when I run the following code, I get a connection lines betweenthese two blocks:

h_blk1 = get_param([gcs '/AC Voltage Source'], 'PortHandles'); 

h_blk2 = get_param([gcs '/Parallel RLC Branch'], 'PortHandles'); 

add_line(gcs, h_blk1.RConn(1), h_blk2.LConn(1), 'autorouting', 'on');

add_line(gcs, h_blk1.LConn(1), h_blk2.RConn(1), 'autorouting', 'on');

When I rerun the following:

add_line(gcs, h_blk1.RConn(1), h_blk2.LConn(1), 'autorouting', 'on');

MATLAB crashes

Answer 1

[MathWorks Support Team]

This bug has been fixed for Release 14 SP1 (R14SP1). For previous releases, read below for any possible workarounds:

This is a bug in SimPowerSystems in the way that ADD_LINE adds lines for connection lines.

To work around this issue, do not add a connection line when there is one.