I saw this post：Routing issues with pgrouting, and try the ability of reverse_cost.
As the result of this post, if there is only one way to go from one node to another, even though the reverse_cost is very huge, pgRouting can still give the result the same as the one that I do not use reverse_cost(but this time the cost is drastically huge), but apparently it's unreasonable.
Then I try to set the reverse_cost to negative value, unfortunately under Win7 the error occurs：
Can someway I can do to solve this problem？
Or under this condition can pgRouting return one acceptable and operable result like "route not found" or "route not connected"？