I think I've gotten the Export part working but can't Import the expression again correctly.
I'm starting with a triangular array of 7X2 integer elements where each row is packed, but I'd settle for any example of Export-Import using GZIP.
Thank you.
-- Mark
Nice example. Here's the problem. (Had to get this from Support.) GZIP returns a String. To undo this one needs ToExpression. In your case, the "CSV" does the necessary conversion.
In hindsight, I can see what's going on. Prospectively, I couldn't figure it out.
Import[ Export["7x2.cvs.gz", ConstantArray[1, {7, 2}], {"GZIP", "CSV"}], {"GZIP", "CSV"}] {{1, 1}, {1, 1}, {1, 1}, {1, 1}, {1, 1}, {1, 1}, {1, 1}}