OK. In office with manual.
DXF plan layout 250 lines max. Single Line or Polylines only.
Lines must be drawn in upstream direction.
First line must be either 1 or last line.
Use snap mode when drawing.
Do not have on layer 0 or any layer beginning with a number.
One outfall at a time only.
DXF as background is for 'pretty picture' no data exchange.
Error is trying to save blank file? DXF not saved in .stm file but in C:\Program files\Hydraflow\Storm Sewers 2005\*.mydxfbackground.dxf
Storm Sewer can only read line, polyline, LWPolyline, arcs and circles up to 250 lines.
No line weights, other entities, blocks, and text.
Only exports dxf plan plots & profile plots.
Ann Wingert, P.E.