Error report for Modelica.Blocks.Examples.RealNetwork1

Warning: in file 'C:\\install\ThirdParty\MSL\Modelica\Blocks\':
At line 821, column 59:
Variable array index in equation can result in slow simulation time
Error: in file 'C:\Users\tove_021\AppData\Local\Temp\jmc3745558755391447307out\sources\Modelica.Blocks.Examples.RealNetwork1.mof':
Semantic error at line 0, column 0:
The system is structurally singular. The following varible(s) could not be matched to any equation:

... elapsed time: 1.70s