Good Morning All,

I have a feeling I'm trying to acheive the impossible but its worth asking the question anyway....

Unfortunately due to commercial in confidence I cant give too detailed an explanation or upload models but I'll do my best to explain.

I have created an overall design of the key forms for a structure. This involves a series of lofts, surfaces and intersections etc and forms the baseline geometry for my design. Within this I have a series of planes with sketches that intersect the part bodys and define the geometry in that plane.

Each of these sketches I have saved as blocks and from this core set of blocks I will build the component parts of my structure by inserting them into new parts and building off them. To ensure continuity going forward, I need to be able to maintain a link (using external references) from the baseline geometry through the block files to the component part geometries.

Effectively I need to create blocks with referneces to both a parent file and multiple children files - any suggestions???

I'm aware that when you insert a block you check 'link to file' and this will create a link from the block to its children (although in all my models to date this had been greyed out!) but I havent found a way to save blocks/or sketches that maintains a link to their source.

Any help would be much appreciated as getting this right could save a lot of man hours - not to mention confusion - in the long term.

Thanks

Alex