Comment 1 for bug 1852197

I am getting this error:

Traceback (most recent call last):
  File "./../inst/bin/yade-trunk", line 337, in runScript
    execfile(script,globals())
  File "/usr/lib/python3/dist-packages/past/builtins/misc.py", line 82, in execfile
    exec_(code, myglobals, mylocals)
  File "2.py", line 41, in <module>
    sp = pack.randomDensePack(pred, radius=sphereRadius, memoizeDb='tmp/single_grass.sqlite', returnSpherePack=True)
  File "/home/anton/dem/yade/inst/lib/x86_64-linux-gnu/yade-trunk/py/yade/pack.py", line 559, in randomDensePack
    _memoizePacking(memoizeDb,sp,radius,rRelFuzz,wantPeri,fullDim)
  File "/home/anton/dem/yade/inst/lib/x86_64-linux-gnu/yade-trunk/py/yade/pack.py", line 400, in _memoizePacking
    conn=sqlite3.connect(memoizeDb)
sqlite3.OperationalError: unable to open database file
[[ ^L clears screen, ^U kills line. F12 controller, F11 3D view (press "h" in 3D view for help), F10 both, F9 generator, F8 plot. ]]