Worm algorithm on customized graphs

[vws100]

The worm code yields errors on custom graphs. Should we update the documentation to restrict to lattices or put an alert in the code telling users to stay on lattices?

Discussed in https://github.com/orgs/ALPSim/discussions/38

^{Originally posted by LAZY1764 March 6, 2026}
When my input lattice is like this, the algorithm worked well.
<LATTICEGRAPH name = "square lattice 3x3"> <FINITELATTICE> <LATTICE ref="square lattice"/> <EXTENT dimension="1" size="3"/> <EXTENT dimension="2" size="3"/> <BOUNDARY dimension="1" type="open"/> <BOUNDARY dimension="2" type="open"/> </FINITELATTICE> <UNITCELL ref="simple2d"/> </LATTICEGRAPH>

But when it changed into a graph(without translation symmetry), the algorithm stopped.
<GRAPH name="triangle" vertices="3"> <EDGE type="0" source="1" target="2"/> <EDGE type="0" source="2" target="3"/> <EDGE type="0" source="3" target="1"/> </GRAPH>
And it returned :"Created run 1 locally
Cannot save a measurement of size 0."