If the out-PC.tif and out-L.tif files are in some /some/other/directory/, and not in pwd, when you run point2mesh it tries to write its temporary file, out-L-tex.tif, to /some/other/directory/ instead of pwd. If you can't write to /some/other/directory, point2mesh just fails.
Can this be changed so that the temporary files are written to pwd.
A 3 year wait for a bugfix which tool 20 minutes (including through testing). Checked in with commit 8cc7fc4.