Please Report ManifoldLab BUGS HERE.

[Hank]

Can I see your file for the above scenario ?

Dump written 2015-1-3_17-15
Version: v1.5.3.2014-12-27---20-07.mlab
Window: "<Unknown Window Name>"
Reason: {badarg,[{erlang,port_control,
[esdl_port,5069,<<255,255,15,0>>],
[{file,"erlang.erl"},{line,2747}]},
{gl,pushAttrib,1,[{file,"gen/gl.erl"},{line,286}]},
{wings_pb,draw_position_1,1,
[{file,"wings_pb.erl"},{line,205}]},
{wings_pb,draw_position,1,[{file,"wings_pb.erl"},{line,200}]},
{wings_pb,loop,1,[{file,"wings_pb.erl"},{line,166}]}]}