Hi Bill, so ok I've looked at your file and it looks like you do have 4 different separate objects in it which are touching each other, so that's running into a problem in IGES where it tends to be difficult for the receiving application to figure out how a big pile of separate surfaces should be glued back together into solids when some of the individual pieces are touching each other.

Using STEP format should probably help with this, that's probably best to send that instead of IGES.

If you must use IGES format for some reason then try exporting each individual object out as a separate IGES file rather than having them all together in one single file. You can do that by selecting one object and using File > Export which writes out just the selected objects to the file you pick instead of everything.

Hope this helps!

- Michael