Help:VE271

The specified TCB flags are invalid, please check the wiki for valid configurations.

The track circuit block (TCB) detector flags on this tag include a contradictory combination. TCB flags are given as a semicolon-separated list and fall into two groups:

• Traffic type - E.g. 'Freight', 'Passenger'. These may be combined with each other and with any track type.
• Track type - E.g. 'MainLine', 'BranchLine', 'YardShunting', etc. These may only be combined with each other in certain configurations.

The following track type combinations are not allowed and cause this error:

• 'MainLine' cannot be combined with any branch-line type ('BranchLine', 'Siding' or 'Spur').
• Yard types cannot be combined with other track types ('MainLine', 'BranchLine', 'Siding' or 'Spur').

You may combine multiple flags within the same group - for example a block can be both 'YardReceiving' and 'YardDeparture'.

To fix this error, correct the flag list so it does not mix incompatible track categories.