Ok Debian first:
PostgreSQL 9.1.9 on x86_64-unknown-linux-gnu, compiled by gcc (Debian 4.7.2-5) 4.7.2, 64-bit
POSTGIS="2.0.3 r11128" GEOS="3.3.3-CAPI-1.7.4" PROJ="Rel. 4.7.1, 23 September 2009" GDAL="GDAL 1.9.0, release 2011/12/29" LIBXML="2.8.0" LIBJSON="UNKNOWN" RASTER
(2.0.0-dev, v2.0.0-beta,1,3782ebc8,develop,1.49.0)
Ok, honing in on one problem I'm seeing with TSP. If I load the test data, I can run TSP according to the example.
SELECT * FROM pgr_tsp('SELECT id AS source_id, x, y FROM vertex_table','2,7,11,9',7);
I get back an appropriate answer. If I run again in sequence, I get an error:
"Error: Error TSP fail to findEulerianPath, check your distance matrix is valid.
********** Error **********
Error: Error TSP fail to findEulerianPath, check your distance matrix is valid."
If instead I run:
SELECT * FROM pgr_tsp('SELECT id AS source_id, x, y FROM vertex_table','2,7,11,9',7);
and then
SELECT seq, id FROM pgr_tsp('{{0,1,3,3},{1,0,2,2},{3,2,0,2},{3,2,2,0}}',1);
I can rerun to my heart's content... .