Richard,
The data table carries a virus that does crash the work sheet, crash, crash, crash ... Then it propagates to the entire PC to the extent I had to pull the plug. Fortunately it seems it had not infected more. Eventually, you might see where I was at, but couldn't even upload !!! No problem with deconvolution but it seems the ILS is a piece of crap out of the blue.
For what it's worth, my Mathcad is back on foot !
Jean