Hi
Cross version (701 / 731) & cross application (NW/ECC) transports are not recommended, and maybe not supported even...
On a technical point of view it might be possible, but you must be sure that your specific programs does not call SAP standard prog/functions... because the function/prog usage / parameters might have change across SAP versions.
The best and safer safer practice would be to manually recreate your developments.
If you really want to play with it :
transport order CE1K9000199 will generate
/usr/sap/trans/cofiles/K9000199.CE1
/usr/sap/trans/data/R9000199.CE1
Regards