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= Caveats for the options =

Here, we document some aspects of the command-line syntax that may be unintuitive or complicated.

== Setting the "cost type" for landmark heuristics ==

For mostly historical reasons, specifying the cost type (see HeuristicSpecification) for landmark heuristics is currently complicated. Here's the complete set of rules:

=== If you use the LAMA-FF synergy ===

There are three relevant options:

 1. {{{lm_cost_type}}} of the landmark generation method (e.g. {{{lm_rhw}}})
 2. {{{cost_type}}} of the landmark generation method (e.g. {{{lm_rhw}}})
 3. {{{cost_type}}} of the synergy declation ({{{lm_ff_syn}}})

The cost type of the synergy's landmark heuristic is determined by option 1. when using {{{admissible=false}}} and by option 3. when using {{{admissible=true}}}.

The cost type of the synergy's FF heuristic is determined by option 2. /!\

=== If you do not use the LAMA-FF synergy ===

There are three relevant options:

 1. {{{lm_cost_type}}} of the landmark generation method (e.g. {{{lm_rhw}}})
 2. {{{cost_type}}} of the landmark generation method (e.g. {{{lm_rhw}}})
 3. {{{cost_type}}} of the landmark heuristic declation ({{{lmcount}}})

The cost type of the landmark heuristic is determined by option 1. when using {{{admissible=false}}} and by option 3. when using {{{admissible=true}}}.

Option 2 is ignored in this case.