Problem with blocks and multiple sheets

Hi,

I'm using SWx 2007 SP4. I have a problem with usingmultiplesheet formats, each containing blocks, inside the samedrawing. Anapparent bug in SWx causes lines to disappear when usingmultiplesheet formats on different sheets inside a drawing.

To reproduce the problem:
1. Save a sheet format (SF1.SLDDRT) that contains a block,which inturn contains at least one line.
2. Repeat step 1 with a different block, also containing atleastone line (SF2.SLDDRT).
3. Create a new drawing based on SF1.SLDDRT.
4. Create a second sheet in the new drawing. Then change thesheetformat of the second sheet to SF2.SLDDRT through thesheetproperties.

When you switch back to the first sheet in the drawing, alllinesin the block will have disappeared. I have not found a way togetthem back. Exploding the block or rebuilding the drawing donothelp.

Does anyone know why this happens, and how to avoidit?SolidworksDrawings And Detailing